If you're having trouble getting algae in a tank with algae eaters there a couple of explanations to consider.
1. They are eating all the algae. Fish can see algae before we can in many cases.
2. The conditions for algae are not correct.
My advice is to buy sinking algae wafers for you algae eaters. Drop them in a couple hours before you turn the lights off. They contain extra vitamins etc. that fish won't get from just eating algae. Don't leave the algae disks in for more than and hour and remove what's left over, otherwise you'll begin polluting your tank water.
Some types of fish known for eating brown algae in aquariums are Siamese algae eaters, otocinclus catfish, and bristlenose plecos.
Ciguatera Fish Poisoning is a food poisoning caused by eating a certain fish, a marine finfish (e.g. barracuda), that has eaten certain algae. The algae make a toxin that is not so harmful for the fish, but it is to humans.
I guess you are asking about "Algae eating fish" If so, then there are so many different species of fish that eat algae that it is impossible to advise you on their colouring. You will need to be more specific.
Most fish and shrimps will eat some forms of algae.
Many species of fish, such as plecos, mollies, and Siamese algae eaters, feed on algae. These fish help to control algae growth in aquariums and ponds by consuming the algae as part of their diet. Algae-eating fish can be a natural and effective way to keep algae levels in check in aquatic environments.
Ciguatera Fish Poisoning is a food poisoning caused by eating a certain fish, a marine finfish (e.g. barracuda), that has eaten certain algae. The algae make a toxin that is not so harmful for the fish, but it is to humans.
Some ocean animals that eat algae include sea urchins, parrotfish, and certain species of snails and fish. These animals help to control algae growth in ocean ecosystems by grazing on algae as part of their diet.
Nothing because no matter. What fish you have in there all algae fish is vegetarian so you don't have to worry about your algae fish eating others.
Algae eating fish include: bottom dwellers such as loaches, cat fish and plecs and many marine and fresh water tropical fish such as plecostomus fish.
To effectively clean black algae from your fish tank, you can use a algae scraper or brush to physically remove the algae from the surfaces. Additionally, you can introduce algae-eating fish or snails to help control the algae growth. Regular water changes and proper maintenance of the tank can also help prevent the growth of black algae.
Algae-eating snails can help maintain a balanced ecosystem in ponds by consuming excess algae, which can improve water quality, reduce algae blooms, and create a healthier environment for fish and other aquatic life.
Small algae eating fish with what appears to have red and silver stripes resembling the flag for which it gets its name.