Fluval 1 "Plus" Foam Insert (2-Pack) is specially developed as a standard filter medium for the Fluval 1 Plus Underwater Filter and maximizes surface contact between the water and the media. The large filtering surface ensures efficient cleaning of the aquarium water and maximizes the colonization of beneficial bacteria.
Foam insert provides mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the module stack.
I have two zoomed filters designed for turtle tanks (I forget what they are called), and after a few months of them getting way too dirty I read a review on amazon that said to use these filter cartridges instead since they let water pass through them much better, and they were 100% right.
get by clogged from anymore,My
Fluval carbon great, cust. Service awful by Fishiefriends05/20/2013
Ordered these carbon packs for my aquarium as I was due for a change. They were listed as in stock, 2 days later I was told they were out of stock, 2 weeks later still had heard nothing and tried to get a hold of cust support regarding the issue, about a week after that they came.