Okay. So I have a Tetra Whisper 10 gal air pump connected to a 2-1 valve that supplies air to two sponge filters in 2 5 gallon tanks. When I first hooked it all up I had loss of flow in Tank 1. Now, I am getting a loss of flow in tank 2. However, it seems that the loss of air flow, in Tank 2, is very noticeable and even hooking up just one hose doesn't seem to fix the problem. So I am thinking that the problem might some how be in the tank itself, within the filter media or tubes. At first glance it does not appear that the hose is kinked or pinched in anyway. I just don't know what might be causing the problem. Anyone ever had a problem like this or know what might be causing this problem?