I have had mine for a year now and I bought it used. I don't really adjust it. I just check it from time to time to make sure the bubbles are churning.
It has flooded on me twice though due to a mis-adjustment.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,