Review on 🐠 Pack of 3 Air-Driven Filter Sponges for MY MIRONEY Aquarium Filter by Popeye Knight

*EDIT* Don't stay put! I've been using this filter in my hospital pool for 2 days and I can't seem to get the filter to stay down at all. I tried different materials and used lined suction cups. The filter keeps popping up and floating on top. I am disappointed in my purchase! Several times I had to put my hand in my hospital tank to adjust the filter. DO NOT BUY FOR HOSPITAL TANKS! Bought this filter for a hospital pool. I removed the stones from the filter and added my own filler as stones can increase water hardness and pH. I don't like that it doesn't last at all. I had to put 4 suction cups on the 8" air line pipe I'm tanning to keep it on the bottom of the tank. Even then, it still tries to show up. Good thing I had suction cups handy, otherwise I wouldn't have been able to set up my hospital aquarium. At least it serves as an air stone.