Hiya, trying to get the new tank to the best it can be, at the moment we haven't got much more than a filter, heater, ornaments and fish in there, we can't afford to do everything at once but little by little we were going to make it just the way we want it. Anyway, will stop talking rubbish, we're wanting to get an air pump to run an air ornament and/or air stone from. I know the air pumps get more powerful the bigger the tank but what output would i need for our 80l tank? Also, what are the pro's and cons of an air pump except for the pretty ornament? lol!