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

they work but the boxes came covered in dirt and charcoal. not sure why that was.

A+++

Simple and easy! The way it needs to be for a 13 year old.

My turtles water tank is always clear thanks to these filter replacements. Ive tried several brands and this one is by far the most reliable. Dont worry if you see some droplets around the box, its normal

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.

These filters are amazing and perfect I’m glad I found them on amazon because some pet stores sell these filters for outrages prices.

Excellent product which met all needs

nice to have plenty of spares.

These filters seem to keep the water pretty clear with minimal effort on my part. We use 2 at a time and change them about every 2 months with no issues. Easy to use, just rinse and install.

This multi- pack of filter media for fish tanks is a good value and the product is high quality.