Review on Marineland PA0137 04 Rite Size Cartridge 4 Pack by Lisa Starcher

Not to mention Marineland carts and filters. The price is only fair if/when you subscribe to them or use them as additional items. Even with that, I can get them cheaper from another source. However, this is the way to go when I don't need a lot of supplies. I've been in the business since. Well just a whole bunch of years lol. I've been using Marineland products for almost as long. There are several companies that have made DIY filter carts. Stick to the original. The money you save on all but one homemade filter isn't worth the mess and hassle.