Understood. I gave up on Koralia's a long time ago. While they were "okay", I despised having them on a wavemaker. The constant clicking/clacking noise on startup drove my wife and I crazy. I sold them and got Sicce Voyagers. Super-quiet, but even though they were rated at a higher flow, felt much weaker than the Koralias. Always liked the looks of the EcoTechs, but couldn't bring myself to pay that kind of price for them. I bought a couple of Jebao RW-8's, and I have to run them less than 50% (closer to 30%) or they blow up the sand (SeaFlor Special) in my 6' tank... and they're pointed slightly up towards the surface. For the price of these pumps, I couldn't be happier. Oh... and they're very quiet. LOL!No worries. I was never a big fan boy of these pumps for the price. But quieter operation, more efficiency/power along with a reduced price tag though has hooked me this time I think. I went ahead and ordered a couple of mp 40's, should be here by mid week. Been wanting to upgrade my old Koralia's for a while now. Never had any problems with them but even after cleaning they just don't seem to have the push that they once did.