I have a 210 gallon reef tank w a 40 gal sump. Been set up for about a year. Knock on wood have not had any serious issues yet. Notice I said yet. Looking forward to everyones help and guidance. Maybe someday I can return the favor when I figure out what I am doing. It's been quit the journal that I have thoroughly enjoyed. Prior to this reef tank I have had salt fish tanks only for years. Finally took the reef plunge.