Keep routine filter maintenance simple and under budget. 200-Micron Felt Filter Bags offer a sensibly priced solution, so stop reusing old or worn filter bags! Easy-to-install mechanical pre-filter bags are great for any sump filtration system. Install over filter drain pipes to trap and remove free-floating debris and ammonia-producing organic matter from your aquarium water column. 200-micron polyester felt filter bags also keep larger objects (sand, rubble, snail shells) from entering the pump chamber, helping to prevent costly pump damage. 200-Micron Felt Filter Bags measure 4" dia x 12" long.

Benefits of Mechanical Filtration
Mechanical filtration can greatly improve the health of most aquariums, and is also important for efficient biological filtration. The process is simple: mechanical media traps solid debris such as fish excrement, sludge, uneaten food, or dust from your aquarium as water passes through. Debris-laden media can then be mechanically removed and rinsed or replaced with ease. This not only reduces the amount of solid debris in your water but also prevents debris from rapidly clogging biological media and creating conditions that prevent efficient breakdown of waste.