R asked:

I have a eclipse tank, was used for freshwater. Can this filter hack it with a saltwater setup? the filters say ‘for system 12 or eclipse setups’. It’s a nice tank, like 20 gallons (it’s only for my triggerfish), and the filters say with black diamond carbon. Will these work, or how could I be able to tell if they will work?
EDIT: We already have a salt tank up, and most of the stuff for this new tank just laying around. But the trigger is sick or something and keeps getting picked on, so we figure he’s not going to last much longer. We thought he’d be happier in a tiny tank all to himself for a while, until he heals, or whatever. We just have the eclipse laying around as well and thought it would save us an expense.

HOWEVER: Is there a concensus? RIght now I am inclined to listen to biggourami as s/he seems to have the most knowledge and, more importantly, conviction.