I have had an Eclipse 6 for ~8 months now and have had several set of fish in it. For some reason nearly all the fish hide behind or next to the intake at the top of the tank. They rarely swim around and it's puzzling me. I have a small castle and two small plastic plants, so there's enough shelter for them (I think). The water tests are all normal. Right now I have two platies in there and both of them are hiding all the time. Any ideas? I'm considering just getting a standard 10 gallon tank to replace this thing. 