I have 4 silver dollar. they are the most hungry fishes among others. The problem is that I am not able to maintain my plants because of the silver dollar as they are eating all my plants. I feed them algae wafers every day twice but then also they are eating up my plants. I really don't care much about plants because I love my fishes but what they do is they tear the plants which result in blockage of the filter. The broken leaves stick to the filter and stop the water flow.