OK, atm I have a topfin air pum with 4 outputs i have double valve to make 2 poweful sponges. so in my upcomming fish room I will have a 75 goldfish tank with 2x Emperor 400s and 2x sponge filters, Beside that I will a 110-150 tall tank with sunfish in it with a bare bottem with 3 sponge filters. I want a good air pump that can handle all five sponge filters at full power. I know you can get the gang valves and add multiple lines but that will impact the force of air to that line. I dont want the pump to be to loud. If i can here them over the god awful sounding emperors then they are to loud. lol