Hey guys I have 2 Fantail Goldfishes and I keep them in a fish tank. I put a jar, a plant, some big and small marbles, a small glass bottle decoration, a for-fun fish signboard that says "NO FISHING" and a barrel. They're all small decorations. The tank itself has a filter and a UV bar light. My fish aquarium was never as dirty as last month. I wash my fish aquarium once a month because I am told to do so from the person I bought the aquarium from.
Okay.. my tank last month had brown and green spots on it and my father cleaned it up and said it was algae. I just want to know how did the algae or whatever that brown and green spots are appeared on the glass of the tank and if I bought Sucker fish, would they eat up the brown and green spots if it ever appears again?
I don't really know what the Sucker fish eats can someone tell please? Thanks.