Hobby Protogen infusoria for fry, Liquizell and Mikrozell
Regular price
6,50 €
Regular price
Sale price
6,50 €
Unit price
/
per
2,16 € × 3 with no fees
Klarna.
Three Hobby starter foods: Protogen, dried infusoria for fry too small for brine shrimp, then Liquizell and Mikrozell, phytoplankton to feed and grow brine shrimp nauplii.
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The summary
- Which product: Protogen for fry, Liquizell and Mikrozell for brine shrimp.
- Protogen: 6 to 12 grains depending on the number of fry, or an infusoria culture.
- Liquizell: from the 3rd to the 10th day of the nauplii.
- Mikrozell: from the 8th or 10th day, to help them grow.
Infusoria for fry larvae, phytoplankton for rearing brine shrimp nauplii
Some fry are born so small that they cannot yet swallow a freshly hatched brine shrimp nauplius: this is true of the larvae of gouramis, bettas and many tetras. During their first days they need food that is finer still, made up of microscopic organisms called infusoria, and that is what Protogen provides. The other two products are not fed to the fish: Liquizell and Mikrozell feed the brine shrimp nauplii, which you grow on so that you have larger prey as your fry develop.
🔬 Protogen, dried infusoria
Protogen is a concentrate of dried infusoria, grown on a nutrient medium: ciliates such as paramecia, in several sizes. You can add it straight into the rearing tank after hatching, at a rate of 6 to 12 grains depending on the number of fry, then double the quantity on the second day, and carry on like this until your young fish accept larger food. The other way to use it is to start a culture of live infusoria, more abundant, which you draw from at meal times.
To start a culture, add 1 g of Protogen to 1 litre of water taken from your aquarium, in a shallow plastic or glass container, never metal, then place it at between 18 and 25 °C under good lighting. The culture is ready in 24 hours, and the infusoria keep multiplying if you leave it to stand. Draw them off with a pipette and release them near the fry several times a day, then prepare a fresh container every 3 to 4 days so that meals are never interrupted. An aquarium thermometer fixed inside the container tells you whether the culture is staying within the right range.
Water free of chlorine and medication for the culture
Use neither freshly drawn tap water nor water from a tank under treatment to start a culture, as residues of chlorine or medication stop the infusoria from developing. Take the water from a healthy, well-filtered aquarium. Also dose the Protogen sparingly when you give it directly, as uneaten grains quickly foul the water in a small fry tank.
🦐 Liquizell and Mikrozell for artemia
A brine shrimp nauplius only grows if it is fed, and these two phytoplankton foods are given in its rearing water. Liquizell, a liquid, is used from day 3: shake the bottle, then add it drop by drop until the water takes on a slight green tint, which is about 20 drops for 5 litres, and add more only once the brine shrimp have cleared this cloudiness. Between day 8 and day 10, Mikrozell, a very fine phytoplankton powder, takes over. It is not given again while green particles remain visible in the water, and it also suits shrimp.
Hatch the nauplii before rearing them
If you do not yet have a hatchery, the Hobby artemia hatching kit brings together the Artemia Breeder hatchery, Artemix and a sieve so you can produce your own nauplii. You feed part of the harvest straight to your fry, and raise the rest in salt water, feeding it Liquizell and then Mikrozell, so that it grows along with them. The hatchery is stirred by a small-output aquarium air pump.
📅 Handing over from one food to the next
A spawn of tiny fry is raised in three stages. In the first few days, your larvae are given the infusoria of Protogen, as granules or as a culture. Once they can swallow freshly hatched nauplii without difficulty, you move on to brine shrimp, which are more nourishing. Later, when your young fish have grown, brine shrimp raised for a few days on Liquizell and then Mikrozell offer them prey of the right size. All three products keep in a dry, cool place, with the tin or bottle tightly closed.
Technical specifications
Protogen
- Nature
- Dried infusoria on a nutrient medium
- Ready to use
- 6 to 12 granules depending on the number of fryAmount doubled on the second day
- Growing
- 1 g per litre, ready in 24 hNew container every 3 to 4 days
- Growing temperature
- 18 to 25 °C, well lit
Liquizell and Mikrozell
- Nature
- Phytoplankton for brine shrimp nauplii
- Liquizell
- Liquid, from day 3
- Liquizell dose
- About 20 drops for 5 LUp to a slight green tinge
- Mikrozell
- Powder, from the 8th or 10th day
In the box
- Protogen: 20 ml of granules
- Liquizell: 1 bottle of 50 ml
- Mikrozell: 20 ml of powder
Doses and usage schedule taken on 12/10/2026 from the Hobby instructions for the three products.
Which product for your stock?
One food for fry, two for brine shrimp. Age decides.
Which product?
Give one answer, and the table highlights the model that suits you.
| For | Moment | Price | |
|---|---|---|---|
| Recommended Hobby Protogen infusoria for fryYour choice | Fry larvae | First few days | 6,50 € |
| Liquizell and MikrozellYour choice | Artemia nauplii | From day 3 to day 10 | 5,50 € |
| Liquizell and MikrozellYour choice | Older brine shrimp | From the 8th or 10th day | 5,50 € |
Hobby Protogen infusoria for fryRecommended
Use
ForFry larvae
MomentFirst few days
Liquizell and Mikrozell
Use
ForArtemia nauplii
MomentFrom day 3 to day 10
Liquizell and Mikrozell
Use
ForOlder brine shrimp
MomentFrom the 8th or 10th day
Liquizell and Mikrozell feed the brine shrimp, which in turn feed the fry.
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Frequently asked questions
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6 key questions
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