in my 20 gallon tank i want to create a wall of air bubbles or what ever you call them.so my current air supply is coming from my filter.would it still be ok to get this pump for my tank.here is the link to the product im thinking about buying.has anyone here used this specific product or something similiar?http://www.petsmart.com/global/product_detail.jsp?ASSORTMENT%3C%3East_id=2534374302023693&FOLDER%3C%3Efolder_id=2534374302030044&PRODUCT%3C%3Eprd_id=845524441776864&bmUID=1142383286579