I have 3x Tune 6055 in my tank, and two Jebao SW20. The grates on the tunze units are just the right size to grab bubble algae while the jebao SW20 units let it pass through. This means the tunze powerheads get clogged with bubble algae within a day while the SW20 units always stay clear. Clogged powerheads cause disastrous problems, so I'm not adding any more of the 6055 units.