[Air Pump]

Thanks for the response.  I should have mentioned that I am currently using the nano pumps. I do love how quiet they are but they are not quite giving the power I desire. Not to mention all of the power cords I have pluged into one outlet.  I am searching for a one pump system using a gang valve.  I wish the linear piston pump was in my budget. Sadly, its not. 

Thanks 

[Air Pump]

I hope someone can offer some fish keeper Veteren advice. 

I am trying to source the best air pump for my current needs.  6 medium and 6 small CoOp sponge filters, all in standard 10 gallon tanks. These tanks are in my living area, so noise level is a major priority. I am also on a fairly tight budget. 

In addition,  is there a standard gallon per hour to achieve proper filtration? How do you calculate air needed for 12 filters. 

Thank you for any advice.