Repashy SuperFoods Soilent Green (Algae Gel)

Repashy SuperFoods Soilent Green is a premium meal-replacement gel premix built for algae and aufwuchs feeders. Made in the USA by Repashy Ventures, it has been a hobbyist favourite for well over a decade, particularly among aquarists keeping plecos, otocinclus, mbuna cichlids, hillstream loaches and freshwater shrimp, as well as amphibian larvae such as tadpoles. Natural algae sit at the heart of the recipe, backed by marine proteins, and the whole thing sets into a firm gel that grazing species take to readily.

The name gives away its purpose. Aufwuchs is the German term for the film of algae, microorganisms and tiny invertebrates that builds up on submerged surfaces, and it is the natural diet of countless algae-grazing fish and larvae. Soilent Green is formulated to replicate that nutritional profile, so the animals that would otherwise rasp biofilm off rocks and driftwood get something close to the real thing. If you keep a planted tank, a shrimp colony or a pond of grazers, this is squarely aimed at you. It sits alongside Repashy Super Green in the range, which leans further into vegetable content for dedicated algae eaters.

For an invertebrate keeper the picture is a little different, and it is worth being straight about that. Soilent Green is first and foremost an aquatic food, so its main draw on the invert side is for shrimp and snail keepers. It can also serve as an algae-and-protein option that isopods will pick at, though it is not an isopod-specific food and shouldn't be treated as a staple for them. If detritivore nutrition is what you are after, Repashy Morning Wood is built for that job, while Repashy Bug Burger suits feeder insects and general cleanup crews.

Preparation is simple. The product arrives as a dry powder premix; add boiling water and stir until it thickens, then leave it to set into a firm gel you can cut into cubes or strips. Drop a small piece into the enclosure or tank and let your animals graze it down. With isopods and other inverts, offer only small amounts and lift out any leftovers before they start to spoil, since a rich, moist food left too long will foul the substrate. You'll find tongs, dishes and other useful odds and ends in our accessories collection, and the rest of our livestock lives in other inverts for sale.

Stored sensibly, a tub goes a long way. Keep the dry powder sealed and cool and it stays good for a long time, so you can make up small batches as and when you need them rather than mixing more than your animals will get through.