Bag of Wheat Germ Sinking koi food by Aquatic Science

Wheat Germ Sinking Aquatic Science, bags from 0.5 to 5 kg

The three pellet sizes: small 2 to 3 mm from 7 cm, medium 4 to 5 mm from 15 cm, large 6 to 7 mm from 25 cm

Wheat Germ Sinking, sinking freshwater food for koi

4,000.00 RSD

Poids	Price	Price per kg	vs 0,5 Kg
2 Kg	4,000.00 RSD	2,000.00 RSD	−17 %
0,5 Kg	1,200.00 RSD	2,400.00 RSD	—
5 Kg	7,600.00 RSD	1,520.00 RSD	−37 %

1,333.33 RSD × 3 with no fees Klarna.

These 100% sinking wheat germ pellets feed koi carp and pond fish when the water cools, between 5 and 15 °C. Highly digestible, with 32% protein, they sink down to the fish that stay near the bottom to prepare for winter or recover in spring.

Ref. ASWGSS2·Fish food

Format aliments : S

Poids : 2 kg

5 Kg, sur commande

Customer support 7 days a week by email

Delivery within 2 to 15 business days

100 % secure payment

The summary

What you receive: 100% sinking pellets in 2 to 3, 4 to 5 or 6 to 7 mm sizes, in bags from 0.5 to 9.5 kg.
What's in it: wheat germ, 32% protein and 9% fat, a formula designed for digestibility.
When to feed it: in water between 5 and 15 °C, in autumn and again when spring begins.
How much to give: small amounts, once a day or a few times a week depending on the temperature.
Which pack size: from the 0.5 kg pouch to the 9.5 kg bag that covers a large pond.
How it arrives: in a resealable bag, delivered to a pick-up point or to your door.

Sinking wheat germ granules for koi, in water at 5 to 15 °C

When the pond water drops below 15 °C, your koi change their behaviour: they come to the surface less, stay closer to the bottom and eat less, because their digestion slows down with the temperature. Wheat Germ Sinking is designed for this period: 100% sinking pellets, made with wheat germ, highly digestible and easy to assimilate. They are intended for water at 5 to 15 °C, that is, for autumn, when your fish are preparing for winter, and for spring, when they are regaining strength. They are also suitable for regions with a harsh climate, where this cold period lasts several months.

🌾 The benefits of wheat germ

In cold water, a koi's digestion slows down, and a rich food stays in its gut for a long time without being properly absorbed. Wheat germ provides easily digestible energy and a more moderate level of protein, here 32% compared with 47% for a growth food. Your fish gets what it needs to build up reserves before winter, and then to regain strength in spring, without the ration turning into waste in a pond where the filter bacteria are also running at a slower pace. The formula also supplies vitamins A, D3, E and C, and it aims at immunity and digestibility, two sensitive points at this time of year.

What a sinking pellet needs

A sinking pellet is no longer visible once it reaches the bottom: you cannot remove what has not been eaten. So feed small amounts, weighed out the first time on a set of scales and then marked in a cup, watch whether your fish take them, and only then add more. Do not feed anything below 5 °C, when the fish are living off their reserves. And do not give this feed to ruminants or any other animal species, as it contains fishmeal.

🍂 Sinking or floating: which to choose

The range also comes in a floating version, with the same wheat germ idea. The choice depends on how your fish behave. If your koi still come begging at the surface in autumn, the floating one lets you see every pellet and remove the surplus. If they stay on the bottom as soon as the water cools, which is common in a deep pond or with timid fish, the sinking one goes to them where they are. Many keepers use both: the floating one while the fish come to the surface, the sinking one when they no longer do.

From 10 to 15 °C

You give a small ration once a day, in a single meal, while your fish build up their reserves before winter.

From 5 to 10 °C

The ration drops to 2 or 3 feeds a week, in small amounts, watching what is eaten.

Below 5 °C

Feeding stops, and your fish live off their reserves until the water warms up again.

An ammonium test to dose the flow

With a sinking pellet, you cannot see what is left on the bottom after the meal, and this surplus breaks down slowly in water where the filter is working at a reduced rate. An ammonium test taken every week through the autumn tells you whether the ration exceeds what your fish eat: a reading that rises from one week to the next signals that you need to cut back the amounts. The same reading guides you in spring, when you increase the rations again.

🌸 Getting going again in spring

At the end of winter, fish are thin and their defences recover more slowly than the parasites and bacteria in the water. This is the time to start feeding again with this feed, as soon as the water stays above 5 to 8 °C, beginning with very small amounts. Increase gradually as the water warms up, then switch to the all-season feed or to Vitality Plus once it rises above 12 to 15 °C. A floating thermometer read in the morning remains the best guide, because pond water warms up much more slowly than the air.

🌱 In aquaponics

In aquaponics, autumn is the period when the crops slow down at the same time as the fish, and when the biofilter loses activity in the cold. A digestible feed, given in moderation, then keeps the water clean. With 32% protein, 100 g of this feed releases into the water, once digested, around 3.3 g of ammoniacal nitrogen, the lowest figure in the range along with the floating wheat germ feed. Uneaten pellets fall into the settling zone or into the grow bed, where they break down slowly: one more reason to feed sparingly. If your system is indoors and the water stays above 15 °C, a warm-season formula is more suitable. The guide to preparing your aquaponic system for autumn details the adjustments for this period.

Technical specifications

The essentials

Pellet type: 100% sinkingIt reaches the fish that stay near the bottom in cold water.
Particle size: 2 to 3 mm, 4 to 5 mm or 6 to 7 mmSmall from 7 cm of fish, medium from 15 cm, large from 25 cm.
Crude protein: 32%The lowest value in the range, for easy digestion in cold water.
Crude fat content: 9%
Operating temperature: 5 to 15 °CBelow 5 °C, no feeding at all.
Distribution: small amounts, several timesOnce a day at around 10 to 15 °C, a few times a week below that.

Guaranteed analysis

Crude fibre: 4.5%
Mineral matter: 8.5%
Calcium: 1%
Total phosphorus: 0.99%
Sodium: 0.13 %
Ingredients: Cereals, oilseeds, fish, algaeCereals and cereal by-products, oilseed products and by-products, fish meal, fish oil, algae, minerals.

Additives and storage

Vitamin A (E672): min. 8,000 IU per kg
Vitamin D3 (E671): min. 1,400 IU per kg
Vitamin E (3a700): min. 160 mg per kg
Vitamin C (3a312): min. 150 mg per kg
Storage: Reseal the bag and store somewhere dry and shadedA bag opened in autumn should be used up by the following spring at the latest.
Manufacturer: Aquatic Science, Belgium

To budget for separately

Pond thermometer: 1 floating thermometer
Meal dosage: 1 set of scales or a graduated cup

12 further specifications are available in the detailed view.

In the box

1 resealable bag of 0.5, 2, 5 or 9.5 kg depending on the pack size chosen
1 manufacturer's label per bag: composition, guaranteed analysis, batch number and best-before date

Guaranteed analysis, additives, composition and the 5 to 15 °C range recorded from the manufacturer's official data sheet on 11/10/2026. The durations covered assume a ration of 0.5% of body weight per day.

Which pack size of Wheat Germ Sinking to choose

It is the same food in all four cases: only the length of time covered, the pellet sizes and the price per kilo change. The durations assume a ration of 0.5% of body weight per day in fresh water.

From 0.5 to 9.5 kg: which one covers your cold season? In cool water, the ration is small and a bag lasts a long time. The right size is the one your fish finish before summer.

	0.5 kgYour choice	2 kgYour choice	Recommended 5 kgYour choice	9.5 kg, made to orderYour choice
What you will find in the box
Bag weight (kg)	0.5 kg	2 kg	5 kg	9.5 kg
Sizes available	medium	small or medium, large to order	medium or large, small to order	medium or large, to order
How long it lasts
Overcast days for 3 kg of fish (j)	33 j	133 j	333 j	633 j
Days covered for 10 kg of fish (j)	10 j	40 j	100 j	190 j
Overcast days for 25 kg of fish (j)	4 j	16 j	40 j	76 j
Who it's for
Suitable for	A trial or a small pond	under 10 kg of fish	10 kg of fish or more, one season	more than 20 kg, or two seasons in the dry
Price per kilo
Position in the range	the highest	intermediate	lower	the lowest of the four
Price	1,200.00 RSD	4,000.00 RSD	7,600.00 RSD	11,400.00 RSD

0.5 kg

What you will find in the box

Bag weight (kg)0.5 kg

Sizes availablemedium

How long it lasts

Overcast days for 3 kg of fish (j)33 j

Days covered for 10 kg of fish (j)10 j

Overcast days for 25 kg of fish (j)4 j

Who it's for

Suitable forA trial or a small pond

Price per kilo

Position in the rangethe highest

2 kg

What you will find in the box

Bag weight (kg)2 kg

Sizes availablesmall or medium, large to order

How long it lasts

Overcast days for 3 kg of fish (j)133 j

Days covered for 10 kg of fish (j)40 j

Overcast days for 25 kg of fish (j)16 j

Who it's for

Suitable forunder 10 kg of fish

Price per kilo

Position in the rangeintermediate

5 kgRecommended

What you will find in the box

Bag weight (kg)5 kg

Sizes availablemedium or large, small to order

How long it lasts

Overcast days for 3 kg of fish (j)333 j

Days covered for 10 kg of fish (j)100 j

Overcast days for 25 kg of fish (j)40 j

Who it's for

Suitable for10 kg of fish or more, one season

Price per kilo

Position in the rangelower

9.5 kg, made to order

What you will find in the box

Bag weight (kg)9.5 kg

Sizes availablemedium or large, to order

How long it lasts

Overcast days for 3 kg of fish (j)633 j

Days covered for 10 kg of fish (j)190 j

Overcast days for 25 kg of fish (j)76 j

Who it's for

Suitable formore than 20 kg, or two seasons in the dry

Price per kilo

Position in the rangethe lowest of the four

Durations calculated at 0.5% of body weight per day, rounded to the day. The colder the water, the smaller the ration and the longer the bag lasts. Analysis and pack sizes recorded from the official Aquatic Science data sheet on 11/10/2026.

Documents & manuals

Official manufacturer's data sheet: composition, guaranteed analysis and vitamins

Download

Estimate your
delivery time

Bag of 0.5 to 9.5 kg depending on the size chosen, shipped to a pick-up point or to your home, as you prefer at checkout. The 5 kg bag in small, the 2 kg bag in large and the 9.5 kg bags are prepared to order, which lengthens the dispatch time. The exact amount is calculated in your basket according to the total weight of your order.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

Which pack size should I choose: 0.5, 2, 5 or 9.5 kg?

It is the same food in all four cases. In cold water the ration is small, and a bag lasts far longer than in summer.

Pack size	Pellet sizes	For 10 kg of fish	What sets it apart
0.5 kg	M	about 10 days	A trial or a small pond
2 kg	S or M, L to order	about 40 days	A late season
5 kg	M or L, S to order	about 100 days	Autumn and spring
9.5 kg	M or L, to order	about 190 days	A large pond, or two cold seasons

Durations calculated at 0.5% of body weight per day, a fresh-water ration. Below 10 °C, the ration drops further and the bag lasts longer.

At what water temperature should it be fed?

How much should you feed, and how often?

Sinking or floating: what is the difference from floating wheatgerm?

	This sinking one	The floating one
Where the pellet goes	to the bottom, towards the fish	to the surface
Controlling the ration	by eye, difficult	easy, surplus removed
For which fish	those that stay at the bottom	those that still come to the surface

The floating wheat germ is the one to use while the fish still come to the surface; this one when they no longer do.

Small, medium or large: which size should you choose?

Should fish be fed during winter?

How much ammonium does it produce?

How long does an opened bag keep?

Estimate your fish's ration in fresh water

Enter the total biomass of your fish, that is, the sum of their weights. The calculation uses 0.5% of the biomass per day, a guide for water at 10 to 15 °C. Between 5 and 10 °C, spread this amount over just two to three feeds a week.

Total biomass of your fish

1 kg80 kg

0g per day

Total daily ration, in a single meal, for water at 10 to 15 °C.

Consumption over a full month at this ration

0 kg per month

The 0.5% factor is a cautious guideline for adult fish in cool water, where digestion is slow. Below 10 °C, the actual ration is smaller still. The overriding rule remains to give only what is eaten, since sinking pellets cannot be retrieved.

Let us talk about your project

A question about this product or your setup? Our team will answer and advise you.

Email us Contact form

Interest-free instalment payments

Offered depending on the cart amount, at checkout.

Delivery in 2 to 15 working days

Depending on the products and shipping sites. Estimate by destination in the estimator on this page.

After-sales service 7 days a week by email or chat

Our team answers all your questions.

Shop responsibly

Become part of the change.

🎁 Your free gift

Wheat Germ Sinking, sinking freshwater food for koi

The summary