Marineland Rite-Size Cartridge Refills (18-Pack, C - Blue)

Using the manufacturers recommendation, also just by looking at the water quality, its obvious these filters are doing their job. My fish love it thank you

Replace filter once a month and I’ve had no issues with my 29 gallon tank. Have 5 snails to keep the algae growth down too. Minimal tank cleaning needed, just the monthly water swap and stone vacuum.

Our filters are great. Easy to remove and insert. We can buy in bulk and save (even better!)

Good price delivered as promised

nice to have plenty of spares.

Excellent product which met all needs