I'm on the verge of purchasing a linear piston pump to operate the bulk of my aeration. The two brands which are readily available to me up here in Canuckistan are Eco-Air and Coralife. They appear very similar in construction and design...perhaps made by the same company and then simply re-branded for various sellers...and prices are fairly comparable as well. Does anyone have any direct experience with one or both of these makers|? If so, could you provide some input, pros vs cons, etc.? Thanks.