Click here for more about avoiding contamination. Be sure you have the light on in your aquarium at most a couple of hours each day, unless you have live plants, and they need more light. To the Top of this Page. Summary Algae is a plant that can grow in your fish's home. Algae doesn't hurt fish.
Algae grows best in water with too much fish waste.
Too much fish waste can harm your fish. So algae is a reminder to change more water. To the Top of this Page. Tropical Fish and Goldfish for Sale Online. All Rights Reserved.