Rated 4.3 out of 5 by 4
Rated 5 out of 5 by Blackdrako3000 Great Filters
I bought a pack of large filters for my Quiet Flow 20. These are very nice. The only thing you have to do to them before you put them in your filter is run them under cold water to rinse of the carbon dust. When you do this, the carbons will start popping. This is the carbon activating. I prefer the active carbon over the passive carbon. They are very well at removing biological, chemical, and mechanical debris all in one.
August 17, 2012
Rated 3 out of 5 by RStevens Great filter, great filter cartridges
These cartridges do keep the filter nice and clear. The filter itself is quiet and does a good job of keeping the water clean. But I do not like the price, I feel there are other filters out there with cheaper replacement cartridges that could work just as well if not better than these.
February 19, 2012
Rated 4 out of 5 by BettaBettaBoy Great for keeping your tank clean!
These work really well. I have a few goldfish ( huge ) ( not koi(s) ) in a tank and the water is always crystal clear! The only bad thing is the price!
January 31, 2012
Rated 5 out of 5 by Hamstersrock101 great product
A great quality filter cartridge. It was easy to replace and it kept my fishs water clear! Great product!
January 5, 2012