Sponge filters for the F Zone 15-L canister filter and making a BCB bag for the canister, too.

Buying the right sponge filters for the F Zone 15-L canister filter and making a BCB bag for the canister, too. Pond Boss Sponge Filters https://www.amazon.com/dp/B00F546PUU?... nat 70 • 19 minutes ago Really appreciate your content, by far the most interesting and investigative out there Rick Hamm • 5 hours ago Thank u Dr Novak. I have a 20 high and I'm going to switch to anoxic. I've learned a great deal from u. Wish I would of had this info when I started. Thank u so much!