Review on 🐠 ELIVING Bio Balls & Mesh Bags Aquarium Filter Media Set - 500 Ct .6 Inch Bio Balls - Ideal Koi Pond Canister Filter, Freshwater & Saltwater Sump - Fish Tank, Pond Filter Media by Krystal Marie

I have a large garden pond with a skimmer filter on one end and a "waterfall" (landscape) that also doubles as a filter on the other. I use these organic beads in a large waterfall and arrange it over a layer of filter material. Beneficial bacteria live in these balls, in which they multiply. This keeps the pond healthy all year round. Helpfully they provide 5 mesh bags to store the bio balls. The bags have a zipper, there is no metal in it, so it won't rust. The balls are made from non-degradable polypropylene so they will last a lifetime.