Currently running the MCE600 for cleaning. I am amazed by the performance of this skimmer. It is producing so much bubbles from diluted citric acid till I thought most of the bubbles are coming from the gassing of the acid. Mind you, it's not seawater, just tap water with critic acid.
Unfortunately, I got a bad piece of second hand equipment. No matter how I lubricate, clean and fix tightly, the pump is still very noisy. Irresponsible seller, I guess. At the cost I bought and the cost of the replacement pump, I can get a brand new one with the white pump, ...... Lesson learnt, second hand stuff stinks 50% of the time.