Thanks Doug, didn't even realise it was BUY/SELL
. Yes sumps do also have the possibility to leak (eh this is the reefing hobby what doesn't leak?). I know with my old tank there was no way to get sump into there and because I had just started reefing I didn't really understand all the fine points of plumbing/ drilling. IMO once you have a sump on a tank its very hard to try and get by with out one.
Levi