Review on 🐟 Aquatic Experts Large Bio Balls Filter Media - 1.5 Inch Pond Filter Bio Ball - Top-Quality Media for Pond Filters – Made in The USA by Lori Stein

I bought these to use in a 20 gallon sump under a 90 gallon aquarium. I split them into two large mesh bags in two sections of the sump under the main tank. I used them to replace 2 gallon ceramic rings that were old and clogged. I wanted a larger bio bead as it would NOT fit in a canister filter and I had a lot of sump space. They correspond to this injury and their number was more than sufficient for my needs. They seem to work well and rinse out easily.