I've reading up on hydor Koralia pumps and I wanted to know which is better between Koralia and maxi-jet. I have 2 75 gallons and each has 2 maxijet 900's. I want less clutter in my tanks. I want to use only one pump, so if I were to get a Koralia, what size is best for my tanks? (both house African cichlids 1 mbuna and 1 peacocks)