Pouch filled with Bio Balls. Great for Canister Filters and Sump. Adds to your biological capacity of your aquarium. I really like using bio balls in canister filters because they don't reduce the flow and are designed to not collect debris. I combine this tactic with an intake sponge so that I only have to service my canister filters once a year.
Always quality products at a good price. Plus Cory does a lot of good for the community spreading knowledge. I will always buy here when I have the ability to!
I love the product and after watching the YouTube video of the filtration system upgrades I bought some and love better the water quality I’m receiving with it.
Actually have not used them yet...waiting on my new tank. However Shipping was crazy fast (happiness) and everything I ordered came in great condition, nicely packed! LUV Corys instructional videos/you tub!! I definitely fell prey to "MTS" :D
These are perfect for my canister. I got them to replace the bag of carbon, and couldn’t be happier.
Perfect for my canister.