Do you know anything about pet fish?

I had the same problem. To prevent algae, you can use the All-Natural Algae Remover on bioverse.com/remove-algae. Some people also get algae eaters for their tank. They're bottom feeders that suck up the algae. Same thing with cory catfish. I have a cory, and it's awesome. Even when a bottle of chemicals were accidentally spilled in the tank, all the fish died but my cory. It's also a good idea to clean the tank more frequently so algae can't collect. Well, back to it. You can also buy algae scapers. Algae scapers are big magnets. You put one magnet IN the tank. The magnet is inside of the thing. On the outside is a spongy like material that. The other side has a magnet on, but, the outside is a cloth-like material. Theyare connected by a string. When you move the outside one around, it pulls the inside one. The inside one scrapes off algae. They're cheap things too. Just $10, but they're really effective! Hope This Helps!