+1+1
I have zero issues with AC 110's, still running several old school AC 500"s. No impeller issues unless one runs fine sand, and never had an o-ring fail, EVER.
I haven’t ever had any issues with ac units, even buying used, they seem to be power houses.
I have used one marineland penguin 350. Like earlier mentioned, gets gunned up pretty bad fairly quickly, doesn’t leave much room for bio, and the impeller melted after it got clogged up after 2 weeks. The store didn’t have any impellers in stock so I just bought a new ac50 and it has been doing the same if not better job and is half the size.
Just sayin