12-22-2013, 08:26 PM
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I like mag drive pumps as they are real work horses. You could also do one of the maxi jet utility pumps,maybe a catalina. There are a few choices on the pumps.The bulb with the purple\blue look most likely has a good spectrum,check its wavelength,it will lack in actual light output so usually when one has only two bulbs one will be 10,000k and one will be actnic.This will provide a decent spectrum and a good look.If you have the option to add a third or fourth bulb then I may say to utilize a purple bulb,although the look can look a little off.