I set up my 55 gallon aquarium a month ago. Plants were okay. Fish were happy. Everything seemed calm, quiet and fine until yesterday when I inspected the Ehiem 2213 filter which is housed in a cabinet underneath the aquarium. I noticed that the outlet hose was "kinked". So I repostioned the filter so that the hose wasn't "kinked" anymore. This caused a higher pressure of water moving in such a fashion that it almost creates a whirlpool. Fish food no longer stays calmly in one place but is circulated around the tank. The Ehiem instructions shows placing the outlet tube in the sides of the tank. It was too long to place there and I didn't want to cut it as suggested by the instructions so I placed it on the longer back side of the tank. What do you think? I wish there was a faucet to adjust the rate of water flow.