As a side note, besides the 704a's I have been running these small Sunsun 603a mini-canister filters on 3 systems (mostly as pre-filters for inline UV sterilizers) even longer, about 2.5 years now.
They come with and without pumps. Despite continually running at 2-3 times their stated max flow rate (450l/hr) I've had zero problems with leaking or anything else. I just wish they would make a similar but larger model with fully 3/4" connectors. Anyway no problem with quality and these Sunsuns, they're just about bullet proof.

They come with and without pumps. Despite continually running at 2-3 times their stated max flow rate (450l/hr) I've had zero problems with leaking or anything else. I just wish they would make a similar but larger model with fully 3/4" connectors. Anyway no problem with quality and these Sunsuns, they're just about bullet proof.
