Review on Penn Plax Bubbler Bottom Filter by Melissa Davis

I have rear mounted filters, I also use these sponge and string boxes for extra filtration and biofiltration. They can be quickly connected to the battery box in the event of a power outage to keep the bike running. It's amazing how well they clean the water and add air to the aquarium. Suitable for fighting fish and fry (without hanging on your back). Cleaning: I take out the pipe with a seam ripper and clean the pipe with a pipe brush. If a hose breaks, a replacement hose is available so you don't have to throw away the filter box.