I recently bought a new type of food to try with my goldfish, called Soilent Green, by Allen Repashy. It's a premade gel food mix that you just add water to. It's formulated for fish that eat algae and small living organisms, which is basically what the goldfish diet consists of, so I thought I'd give it a try. Here are my thoughts about it, in an easy-to-read list format...
-The finished gel is very soft and easy for the fish to rip apart.
-Although the gel is very soft, it does not disintigrate in the water.
-It's very easy to make; just add water!
-A commercially-formulated food is more likely to have all the necessary vitamins and minerals in the correct proportions.
-It stays fresh in the refrigerator for up to two weeks.
-My fish find it very tasty!
-It is expensive.
-Because it contains so much algae, it can cause a yellow tinge in predominantly white goldfish.
Overall, I really like the Soilent Green gel food, and I'll definitely keep using it! In the past, I have mainly used Saki-Hikari sinking goldfish pellets. I don't have any issues with that food, but I still would prefer to feed my fish a gel food, because I think the gel is easier for them to digest. I have also tried making my own homemade gel food for my fish in the past, but I always felt it was not adequate for a few reasons. For one thing, I think it's very difficult to get the right proportions of vitamins and minerals for optimal fish health in a homemade gel food. I also thought the binding agent (unflavored gelatin) used in most homemade gel foods was not a very good choice for fish. And lastly, it seemed to spoil quickly, even though it was stored in the refrigerator. All in all, I feel there are just too many unknowns with homemade gel food, and I won't feed it to my fish in the future. Now that I have such an easy alternative with the Repashy Soilent Green, I won't need to anyways!
Here's a video showing how easy it is to make Soilent Green: