Marineland 24-Pack Penguin Rite Cartridge, Size C

These are pretty good. I use two in one filter. Or four in a double sided filter. Two on each side. To help clear your water even more.

Great Deal! Definitely a must with my fish tanks! Works as directed and very sturdy and strong. Buy with confidence!

these size c filters do the job. put them in and over night you can see the difference. will buy more when I need them.

Very good shipping time and product quality!!!

great price

Exactly what I wanted

Product as described!

As expected. Great price.

what else can I say....Its Marine Land

Good product at a reasonable price. Seller provided excellent service