Replacement Micro-Filtration pads or all API Filstar XP and Rena Filstar XP Series Canister filters. White pads which remove extremely fine waste, sediment and particles from water. Helps clear and polish water. Replace pad once monthly or sooner if necessary. The ultimate FilStar filtration media. These micro-filtration pads provide superior aquarium water polishing and add the finishing touch for a crystal clear aquarium.
Can't beat this price anywhere. Even the regular price is excellent
API Micro Filtration 8/26/2013
Reviewer: Ken Clink
These are some of the best filters that I have had the ones I previousily had were to dense and would always clog. These do the job just as well without cloging so fast.
Filstar Micro-Filtration Pads 4/8/2013
Well, I just love these pads. I always put 2 in my canister and the water is clean, bright and polished. It is properly a waste of money but by putting 2 in at the same time and changing them out "when needed", I am never disappointed with the results.