So I've tried keeping fish recently. I've got a nice 10 gallon tank, gravel, fake plants, and some rocks. I've established the tank, added nummy bacteria and kept the temperature at optimum levels.

However, I've been having trouble keeping fish alive. I've tried Platties and Goldfish with no success.

I currently have a filter that's rated for 10 - 20 gallon aquariums. I have noticed that when the fish are in the area near the intake for the filter they tend to have to swim harder to get away from it.

Is it possible that the pump is too powerful for the tank? Does anyone have any suggestions?