Just a bit from my experience, the maxijets do not hold up to any on off wavemaker. It destroys the impeller weather or not if it has safe start. Now the Koralia powerheads seems to hold up against the on off wavemakers, I have yet to have one break on me. I have a total of 10 of them on separate reef keeper lites. Although they get bashed on (reef keeper lites) I don’t have the money to spend on a nice control system. I am just a poor college student. The Koralia’s along with the reef keeper lite work just fine for me, they are going on 1 year with out any issues what so ever. I do however wish I had any tunze or a MP(10, 20 , 40). Too much cash for me so I will stick with the low-end stuff. Hey all that I can say is my three tanks jam with great coral growth, I keep everything from easy softies to difficult sps and I propagate like a mad man because of the growth.