Rated 3.6 out of 5 by 7
Rated 2 out of 5 by Liriodendron Bad shape
The ROUND BOTTOM requires that you buy only these proprietary replacement cartridges. They're hard to find, expensive and only seem to come in a 2 or 4 pack. I'm throwing away the EX 30 power filter for this reason.
January 23, 2016
Rated 2 out of 5 by ShaShaGrace Works okay, but limits options
I prefer not to use carbon in my filters because it removes medications (I only add it after a treatment when I wish to do so). I would like to see a non-carbon option (such as the "you-assemble" value packs for the older Whisper filters, which I just left the carbon out of). Right now I'm treating a tank for ich, and I had to rig up a filter out of the wrong-shape filter inserts so I would still have some filtration during treatment. How annoying! However, I gave the product two stars for convenience alone, because that's what's most important to some people.
March 10, 2015
Rated 4 out of 5 by PurpleHel Frustrating that they don't make the economy packs for this model!
These filters are great, but it's very frustrating that they don't make economy packs for this model. Also, only having pre-made filters available is inconvenient when there's a situation where one needs to run a carbon-less filter.
September 5, 2014
Rated 4 out of 5 by thompson Over all this is a good product.
I like this filter. Its very quiet, and the flow of water is great. However 15 bucks for 4 filters is a high price.
February 24, 2013