I forgot I had some 30ppi and 20ppi samples in my Fluval 304 inside the bottom basket.
THey are both about 1" thick. I will tell you this much, if the "junk" doesn't come out with bleach and water, I will be throwing the sponges away. Very hard to clean. I had them in for TOO long but on any note, if you can't clean them fully, they may not work.
THey are both about 1" thick. I will tell you this much, if the "junk" doesn't come out with bleach and water, I will be throwing the sponges away. Very hard to clean. I had them in for TOO long but on any note, if you can't clean them fully, they may not work.