Marina (3 of Each) Slim Filter Carbon Plus Ceramic Cartridges and Zeolite Plus Ceramic Cartridges

Ive used this brand for over a year and like the convience of ordering at Amazon.....and the protect is mess free.

Work great. Keep water clean and clear. Good deal on how many there are in pack.

Super crystal clear water when I use one of each. Never have any issues with the water quality in my fish tank.

Easy to replace, works for 2 weeks then needs replacement. Works well