I currently have a cheapo ebay powerhead which works fine, but it's big and bulky, kind of loud, and sometimes the suction cups let loose and I wind up with a sand storm! I'm thinking of buying a koralia 425. Would this be enough flow for my 30 gal
tank? I have the current ph on the right side of the tank and on the left is the return line from the sump which puts out a good flow. Would 1 koralia 425 be enough?