Some types of algae float and multiply in the water. Other types of algae will grow on objects such as the rocks, ornaments, gravel, plants, and the glass in your fish's home. To the Top of this Page. Like all plants algae needs water, light, and nutrients. If your fish's home has too much algae, we know your water is getting lots of light and has lots of nutrients dissolved in it.
Fish eat food and produce waste that is an excellent plant nutrient.
There are four approaches to getting rid of algae. Get some fish to eat it, poison the algae with chemicals, reduce the amount of light, and starve the algae by reducing the amount of nutrients in the water. Algae Eating Fish. Plecostomus Catfish and Siamese Algae Eaters are both good aquarium fishes that will eat some types of algae growing on the objects in your fish's home. But they will usually not eat all the algae, and we don't have a fish available that will filter out the algae that is growing in water and making the water green.