right, but i did drill a hole and tried to engage the air pump. it was a brilliant idea but caused a great deal of pressure to form on the tank, causin water to seap out along the black trim on the bottom. so i used a spare tube and put that into place of the drilled one. its been so quiet now without that whisper running. so i think ill probably go with it for now.
so, what should i do now for agitation, if anything? i ask because i thought it was necessary to facilitate gas exchange. or does the exchange come even when the water is exposed to the air, regardless of whether the water moves or not?