Koi Food Filters
Kusuri Koi Food
Trusted koi food, pond fish food and specialist seasonal diets from Kusuri
Kusuri koi food is a well-known choice for koi keepers who want practical feeding options across the main pond season. The Kusuri range includes premium daily foods, multiseason feeding, wheatgerm for cooler water, growth food for warm-weather development, Kolor for colour support, staple food for everyday feeding and sinking pellets for bottom-feeding pond fish. This makes Kusuri useful for customers who want a recognised koi brand with options for different temperatures, feeding goals and pond setups.
At That Pond Guy, our Kusuri Koi Food category brings the available foods together so you can compare the range by food type, feeding season, pellet behaviour, pellet size and bag size. Whether you need a dependable everyday koi food, a more advanced premium diet, a digestible spring and autumn wheatgerm food, a summer growth food, a colour-supporting food or a sinking pellet for fish that feed lower in the pond, Kusuri gives pond keepers a clear range to work from.
Choosing the right Kusuri koi food
For regular feeding, start with Kusuri Staple, Kusuri Multiseason or Kusuri Premium With Kōso P, depending on how advanced you want the food to be. These sit naturally alongside our wider staple and complete koi food and all season koi food categories. For cooler spring and autumn feeding, Kusuri Wheatgerm With Kōso X is the key seasonal option and can be compared with other wheatgerm koi food products.
For active summer feeding and body development, choose Kusuri Growth Koi Food or compare it with the wider growth koi food category. For pigmentation and visual appearance, Kusuri Kolor Koi Food sits within our colour-enhancing koi food range. If you need food for fish that feed beneath the surface, Kusuri Sinking Pellet can be compared with our sinking koi food category and, where relevant, dedicated sturgeon and sterlet food.
Kusuri Kōso P and Kōso X foods
Kusuri’s newer Premium, Multiseason and Wheatgerm foods are closely associated with the Kōso P and Kōso X spray systems. These are used with selected Kusuri foods to support nutrient conversion, digestibility and the feeding programme. They are a useful choice for koi keepers who want to get more from their food, but they should still be used according to the product guidance and the pond conditions.
Good feeding is not about pushing food into the pond. It is about matching the right food to the water temperature, fish activity and filter capacity. Richer foods such as growth and colour diets are best used when koi are active and the pond filter can safely handle the extra waste. Wheatgerm and lighter seasonal foods are usually better when the water is cooler.
Feeding advice for Kusuri koi food
Feed small amounts that are eaten quickly and reduce feeding if fish become slow, stressed or uninterested. Uneaten food should be removed where possible. If ammonia or nitrite are present, reduce feeding immediately, regardless of the food brand. Strong feeding only works when the pond is ready for it.
Kusuri foods work best alongside regular water testing, suitable pond filtration and good aeration, especially in warm weather or heavily stocked koi ponds. Browse the products below or use the filters to compare Kusuri koi food by food type, feeding season, pellet behaviour, pellet size and bag size. You can also return to the main koi food category to compare Kusuri with other brands such as Hikari koi food, JPD Food, FD Koi Food, Kiyomizu Koi Food, NT Labs Medikoi food, Takazumi koi food, Pro Line Aqua koi food and Aqua Source koi food.
Products in the Current Kusuri Koi Food Range
For Kusuri Koi Food, use the individual links to compare pellet size, pack weight and feeding guidance. Tell us the koi sizes, water temperature and aim if you would like us to narrow the choice before you buy a sack.
Kusuri Koi Food FAQs
What is Kusuri koi food?
Kusuri koi food is a range of pond fish foods for koi, carp and ornamental pond fish. The range includes Premium, Multiseason, Wheatgerm, Growth, Kolor, Staple and Sinking Pellet options, giving pond keepers different foods for different seasons and feeding goals.
It is useful for customers who want a recognised koi brand with choices for everyday feeding, growth, colour, cooler weather and sinking feeding.
Is Kusuri koi food good?
Kusuri koi food can be a good choice for many koi ponds because the range covers several practical feeding needs. It includes staple foods, seasonal foods, higher-performance diets and specialist sinking pellets.
The best result comes from choosing the right Kusuri food for the pond conditions. A good food still needs sensible feeding, good filtration and stable water quality.
What Kusuri koi foods are available?
The Kusuri range on the site includes Kusuri Premium With Kōso P, Kusuri Multiseason With Kōso P, Kusuri Wheatgerm With Kōso X, Kusuri Growth Koi Food, Kusuri Kolor Koi Food, Kusuri Staple Koi Food and Kusuri Sinking Pellet.
Use the filters on this page to compare food type, feeding season, pellet behaviour, pellet size and bag size.
What is Kusuri Premium With Kōso P?
Kusuri Premium With Kōso P is an advanced premium koi food designed for active feeding programmes where growth, colour, digestion and overall condition are important. It is one of the more advanced foods in the Kusuri range.
It is best used when water temperature and pond conditions are suitable, rather than treated as a food to feed heavily all year round.
What is Kusuri Multiseason With Kōso P and X?
Kusuri Multiseason With Kōso P and X is a multiseason koi food designed for broad feeding use. It is aimed at koi health, growth, colour and environmental performance across suitable conditions.
It is a good option if you want one Kusuri food to cover a wider part of the feeding season, but feeding should still be adjusted to temperature and fish activity.
What is Kusuri Wheatgerm With Kōso X?
Kusuri Wheatgerm With Kōso X is the main cooler-weather seasonal food in the Kusuri range. It is designed for spring, autumn and other cooler periods when fish are active but richer summer foods may be too heavy.
For more seasonal options, compare it with our wider wheatgerm koi food category.
What is Kusuri Growth Koi Food?
Kusuri Growth Koi Food is Kusuri’s growth-focused food for warm-water feeding. It is intended for periods when koi are active and able to use higher nutrition for body development.
If growth is the main aim, compare it with other growth koi food options.
What is Kusuri Kolor Koi Food?
Kusuri Kolor Koi Food is Kusuri’s colour-supporting food. It is used when the aim is to support natural pigmentation, contrast and appearance during active feeding periods.
For other colour foods, browse colour-enhancing koi food.
What is Kusuri Staple Koi Food?
Kusuri Staple Koi Food is a floating everyday food for koi and cold-water ornamental pond fish. It is a more straightforward option than the premium, growth or colour foods.
For regular daily feeding comparisons, browse staple and complete koi food.
What is Kusuri Sinking Pellet?
Kusuri Sinking Pellet is a sinking all-season pond fish food for species and situations where food needs to go below the surface. It can be useful for bottom-feeding pond fish and mixed ponds.
If you need dedicated bottom-feeding options, compare it with sinking koi food and sturgeon and sterlet food.
Is Kusuri Sinking Pellet suitable for sturgeon and sterlet?
Kusuri describes its Sinking Ornamental Food as suitable for a wide range of species including sturgeon, koi carp, sterlets, tench and goldfish. It is a sinking pellet, which is important for fish that feed lower in the pond.
For sturgeon and sterlet, always make sure food reaches the fish and is not stolen by surface-feeding koi.
Is all Kusuri koi food floating?
No. Many Kusuri koi foods are floating, such as Staple, Growth and Kolor, but Kusuri Sinking Pellet is designed to sink.
Choose floating food when you want to watch fish feed at the surface, and sinking food where the fish or pond setup calls for lower-level feeding.
Which Kusuri food is best for everyday feeding?
For everyday feeding, Kusuri Staple, Multiseason or Premium may be suitable depending on the pond, water temperature and feeding goals. Staple is the simpler everyday option, while Premium and Multiseason are more advanced.
If you want to compare across brands, browse staple and complete koi food and all season koi food.
Which Kusuri food is best for spring feeding?
Kusuri Wheatgerm With Kōso X is the most obvious spring feeding option when fish are active but the water is still cool. Spring feeding should start gently because both the fish and filter are still waking up after winter.
Do not move too quickly into growth food if the water temperature is still low.
Which Kusuri food is best for autumn feeding?
Kusuri Wheatgerm With Kōso X is usually the best Kusuri choice for autumn as the pond cools. It can help with seasonal feeding when koi are slowing down but still active.
Reduce the feeding amount gradually as fish activity drops and stop feeding if the fish lose interest.
Which Kusuri food is best for summer feeding?
For summer, Kusuri Growth, Kusuri Kolor, Kusuri Premium and Kusuri Multiseason may all be useful depending on your aim. Growth is for body development, Kolor is for colour support, and Premium or Multiseason are broader diets.
Summer feeding still needs good oxygen, filtration and water testing.
Which Kusuri food is best for growth?
Kusuri Growth Koi Food is the main Kusuri product for growth. It is best suited to warm-water feeding when koi are active and the filter can handle a higher feeding rate.
Growth also depends on genetics, water quality, pond size and oxygen, not just the food.
Which Kusuri food is best for colour?
Kusuri Kolor Koi Food is the main Kusuri option for colour support. It should be used during active feeding periods and with stable water quality.
Colour food should not be overfed to force quick results. Koi colour also depends on genetics and overall condition.
Which Kusuri food is best for cooler weather?
Kusuri Wheatgerm With Kōso X is the main Kusuri cooler-weather food. Wheatgerm foods are normally chosen in spring, autumn and cooler periods when fish are active but digestion is slower.
Feed lightly and watch fish behaviour closely.
Can Kusuri food be fed all year round?
Some Kusuri foods are designed for wider seasonal use, but feeding should not run on one setting all year. Fish appetite and digestion change with water temperature.
In cold conditions, reduce feeding or stop completely if fish are inactive.
Can Kusuri food be fed below 10°C?
Feeding below 10°C should be very cautious and depends on the product guidance, the pond and whether the fish are genuinely active. Some sinking or wheatgerm-style foods may be used sparingly in certain conditions, but heavy feeding is not suitable.
If fish are sitting low or not showing interest, do not feed.
What temperature is best for Kusuri Growth?
Kusuri Growth is best used in warm-water conditions when koi are active and can digest richer food efficiently. Kusuri’s own guidance for Growth focuses on warm feeding, with the best results at higher temperatures.
Do not push growth food in cool water.
What is Kōso P in Kusuri food?
Kōso P is part of Kusuri’s spray system used with selected foods such as Premium and Multiseason. It is associated with improved nutrient digestibility and supporting the feeding programme.
Always follow the product instructions for how much to use and how to apply it.
What is Kōso X in Kusuri food?
Kōso X is associated with Kusuri Wheatgerm and Multiseason foods. It is used as part of the feeding system to support nutrient conversion, digestion and seasonal feeding performance.
As with Kōso P, it should be used according to Kusuri’s own guidance.
Does Kusuri Premium need Kōso P spray?
Kusuri Premium With Kōso P is designed to be used with the Kōso P system. The spray is part of the overall product concept, so the food should be used according to the instructions supplied.
Allow coated food to dry if the product guidance says to do so, and store it correctly.
Does Kusuri Wheatgerm need Kōso X spray?
Kusuri Wheatgerm With Kōso X is designed around the Kōso X system. Use the spray in line with the instructions and do not guess the dose.
As with any coated food, only prepare what can be stored and used safely within the product guidance.
Can I mix Kusuri foods together?
Yes, Kusuri foods can be mixed as part of a sensible feeding programme. For example, you may transition from wheatgerm into multiseason or premium food as temperatures rise, or blend sinking food with other foods for mixed feeding behaviour.
Mixing foods should not mean feeding more overall. Keep the total amount controlled.
Can I mix Kusuri Growth with other Kusuri foods?
Yes, Kusuri’s own guidance mentions mixing Growth with other Kusuri diets for larger koi, depending on the feeding programme. This can help balance growth with overall condition.
Use Growth mainly when conditions are warm and suitable.
Can I mix Kusuri with other brands?
Yes, Kusuri can be mixed with other suitable koi food brands if the foods suit the same season and feeding purpose. Many pond keepers mix brands to balance value, growth, colour, digestion and fish preference.
Introduce changes gradually and watch fish behaviour.
Can goldfish eat Kusuri koi food?
Goldfish can eat some Kusuri foods if the pellet size is suitable. In mixed ponds, choose a pellet size that smaller fish can manage comfortably.
Very rich growth or colour foods may not be necessary for simple goldfish ponds, so a staple or seasonal food is usually more appropriate.
Can sturgeon eat Kusuri koi food?
Sturgeon should not rely on standard floating koi food. They need sinking food that reaches them properly. Kusuri Sinking Pellet is the relevant Kusuri option for bottom-feeding fish.
If sturgeon are kept with koi, feed carefully so koi do not take all the food first.
Is Kusuri food suitable for mixed ponds?
Yes, some Kusuri foods are suitable for mixed ponds, especially Staple, Multiseason and Sinking Pellet depending on the fish species. Choose food around the smallest fish and the feeding behaviour in the pond.
For mixed garden ponds, avoid using rich growth food as the only diet unless the pond conditions support it.
Is Kusuri food suitable for heavily stocked koi ponds?
Kusuri food can be used in heavily stocked koi ponds, but feeding must be controlled. Heavily stocked ponds create more waste and have less margin for error if feeding is too high.
Good filtration, aeration and regular water testing are essential.
Can Kusuri food be used in an automatic fish feeder?
Many dry Kusuri pellets may be suitable for automatic fish feeders if the pellet size and shape work with the feeder. Floating pellets are usually easier to monitor than sinking food.
Test the feeder over a tray before relying on it, especially after changing food.
Can Kusuri Kōso-coated food be used in an automatic feeder?
Be careful using coated food in an automatic feeder. The food must be dry and free flowing before it goes into the hopper, otherwise it may clump or dispense unevenly.
Follow Kusuri’s own guidance on drying, storage and how long treated food should be kept.
What pellet size should I choose in the Kusuri range?
Choose pellet size around the smallest fish that need to eat it. Medium pellets suit many adult koi, but smaller fish may need smaller food.
If fish spit food out or struggle to swallow, the pellet may be too large.
Is Kusuri food low waste?
Kusuri’s advanced foods focus on digestibility and nutrient conversion, but no koi food is waste-free. Fish still produce waste, and uneaten food will still break down in the pond.
Feed carefully and make sure the filter can cope with the amount being fed.
Can Kusuri food make pond water cloudy?
Any food can contribute to cloudy water if it is overfed, left uneaten or used when the filter is struggling. Kusuri food should still be fed in controlled amounts.
If water clarity worsens after feeding increases, reduce feeding and test the water.
Should I test the water when feeding Kusuri food?
Yes, especially when increasing feed, switching to growth food or using richer diets. Use regular water testing to check ammonia, nitrite, nitrate, pH and KH.
If ammonia or nitrite are present, reduce feeding immediately.
Does Kusuri food need good filtration?
Yes, all koi food needs suitable pond filtration. The more food you feed, the more waste the filter has to process.
This is especially important with growth and colour foods during warm weather.
Does aeration matter when feeding Kusuri food?
Yes, pond aeration matters whenever feeding rates are higher. Fish and filter bacteria both need oxygen, and feeding increases oxygen demand.
Warm water holds less oxygen, so aeration is particularly important in summer.
How much Kusuri food should I feed?
Feed only what fish will clear quickly. Avoid leaving food in the pond, especially sinking food that is harder to see once it reaches the bottom.
If food remains uneaten, reduce the portion size or number of feeds.
How often should I feed Kusuri food?
Feeding frequency depends on temperature, fish activity, food type and filtration. In warm conditions, smaller feeds more often can work well. In cooler conditions, feed less often and use a more suitable seasonal food.
Do not feed heavily just because the fish appear hungry.
How should I store Kusuri koi food?
Store Kusuri koi food sealed in a cool, dry place away from damp, direct sunlight and pests. Good storage protects freshness and helps avoid clumping or spoilage.
Do not feed food that smells rancid, looks mouldy or has changed texture.
Can Kusuri food go off?
Yes, all koi food can go stale or spoil. Oils can degrade, and moisture can damage pellets. This is especially important with opened bags and any food that has been treated or coated.
Buy a bag size you can use while the food is still fresh.
Should I buy 5kg, 10kg or 15kg Kusuri food?
Choose bag size based on how quickly you will use the food. Smaller bags are useful for trial feeding, small ponds or seasonal foods. Larger bags can be better value for larger koi ponds with higher feeding rates.
Do not buy a large bag if it will sit open too long.
How does Kusuri compare with Hikari?
Kusuri and Hikari koi food are both recognised koi food brands, but they have different ranges and feeding approaches. Kusuri is strong for Kōso foods, wheatgerm, growth, colour and sinking pellets, while Hikari has a broad range including Saki-Hikari options.
The right choice depends on your koi, season, budget and feeding goals.
How does Kusuri compare with JPD or FD Food?
Kusuri, JPD Food and FD Koi Food all offer specialist koi food options. Kusuri has a strong UK-recognised range with Kōso systems, while JPD and FD are often chosen for Japanese-style growth, colour and health-support feeding.
Compare by food type rather than brand name alone.
Which other koi food brands should I compare with Kusuri?
Alongside Kusuri, it is worth comparing Aqua Source koi food, Burtons koi food, Cloverleaf koi food, Evolution Aqua koi food, Kiyomizu koi food, NT Labs Medikoi and Yamitsu koi food.
Use the brand pages and food-type categories to find the best match for your pond.
Why buy Kusuri koi food from That Pond Guy?
That Pond Guy brings Kusuri koi food into a wider pond feeding range, making it easier to compare by food type, season, pellet behaviour, pellet size and bag size.
Use this page for Kusuri products, or return to the main koi food category to compare every brand and feeding type.
