While on the topic of Rena Smartfilters.....
I have the Rena Smartfilter 55. I'm using it for two red eared slider turtles that I keep in a 40 gallon tank. It seems like most people that use this website are fish owners, but I figured I'd give it a shot anyway. Anyway, the filter works great, the only problem is the sound of the water dropping back into the tank is driving me crazy! I need to leave the water level in the tank about 2 inches below the top of the tank so that the turtles can get on their basking dock, so simply raising the water level isn't an option. The only thing I can think of is to attach some sort of slide so that the water isn't dropping, but I don't know what to make it out of or how to attach it. If you have any ideas please respond! Thanks!