FWIW, Got a CSS220 that ran for years on the 65... Never had an unexpected (read one I shouldn't have known was coming) overflow - meds/treatments etc with warnings "turn off skimmer" were the only thing to cause issues...
It worked pretty well, I've gone back to an old school air driven skimmer now (power & heat issues). While High zoot is nice, can't beat the reliability of a small pump + air pump; yep I have to change that airstone every month, it's backbreaking work compared to cleaning the needlewheel pump I tell ya 
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