Mumma.of.two
Aquarium Advice Obsessed
If you can cut the hood to allow for another AC50 that would work. You can run a canister along with the HOB then if needed you can use the HOB as a hospital tank filter. Or upgrading to a AC110 would work also. Its really up to personal choice. If you do replace the filter you will need to run the new one along side the the old one to seed it for about a month or move all the filter media from the old filter to the new one so you don't loose the BB.