The tank Rachel runs is a 150, with a corner Matten that feeds into a canister for flow. So, yes, you can definitely run a 120 with one. Reach out to Stephan at Swiss Tropicals--he's a great guy, and will help you determine what's going to be best for your setup. Not sure where in Canada you are located, but Swiss Tropicals attends a lot of conventions, and Stephan will talk shop with anyone who's interested.
Discus Hans runs all his tanks on a matten filter concept--the filter is in a sump rather than in tank, with a bank of tanks running into a single sump.
Discus Hans runs all his tanks on a matten filter concept--the filter is in a sump rather than in tank, with a bank of tanks running into a single sump.