Review on Marineland PA0137 04 Rite Size Cartridge 4 Pack by Tonya Brown

Premium filters for Marineland pumps. They work very well. The price is in the normal range. They can be washed and reused but I would only recommend once. Use a spray bottle, spray the back first, turn it upside down and spray from top to bottom, do not rub. I've been doing this for years and this is the best way I've found to clean them enough to reuse them. After 2 uses, the activated charcoal is disposed of, i.e. throw it away and use a new one.