AquaClear Filters are the best
926869
I use AquaClear filters on all my tanks from the larger 75 gallon, down to the smallest hospital tank.  They are best hang-on-back filters you can buy, in my opinion.

The best part of these filters is their versatility.  You can use the foam, carbon, and biomax media built for the filter, and you can also add your own media bags and filter media (even from other manufacturers) to make this a truly versatile filter.  Plus, they move a lot of water for excellent filtration, they're easy to maintain, and relatively quiet.
2636809
I like these filters so much, I have one on ALL of my big aquariums!  These things kept my aquariums crystal clear for over 5 years and, when the AC ADAPTER blew on one of them, Eheim supported their product by sending me a free replacement ... even though I was out of warranty.

Way to stand behind your product EHEIM!!!
44147
This is the ultimate power filter. I have used Aquaclear filters for over 15 years in my aquariums, and always come back to them. Durable, highly customizable, and low maintenance costs are the main reason I have stuck with Aquaclear filters. At one point I switched to Emperor Biowheel filters, but they don't have the same mechanical or chemical filtration capabilities as this filter and the biological component is overrated on Biowheels. On top of that, Penguins are far more expensive and the cartridges are expensive as well. I can fill the bags for my Aquaclear with my prefered activated carbon, and add another bag with biological media. Simply rinse out the mechanical sponge in aquarium water and you have all the biological capacity you would ever want.

Don't waste your time with any other hang on back filter, none can ever come close to an Aquaclear.
1211810
EcoAqua filters are great quality and make our water taste like it should.  We've seen no difference between this and the more expensive Samsung filters.
2387609
Great filtering product. Extremely efficient and can be rinsed and used over and over again. Amazing product.
4585724
Much much better water quality with these filters.
580334
Obviously i knew what i was buying so it's hard to review something that is sort of a spare part, so to speak. I needed these filter refills for my water container but these particular ones are kind  of hard to find in store so i just order them off amazon. They make the water super clean and according to my husband, this brand is superior to Brita.
2069059
These filters do an excellent job of filtering the water to where I notice less particles when I clean the fountain each week. A good rinse under clear running water and they last about five or more cleanings.
3864511
I run 2 of these on my 55 gallon and they keep the water crystal clear. I like being able to rinse the sponge rather than replace cartridges. I would recommend to anyone looking for a quality HOB filter
272522
Having well water with a high mineral content we cannot use the ultrasonic humidifiers (too much white 'dust'). Being that we have to use the cool evaporative models, finding replacement filters for earlier models isn't easy. And if you can even find the original filters, most sellers want and arm and a leg for them. We found these replacements for our older ProCare and Relion humidifiers and they are just like the originals, only MUCH less expensive. So glad to be able to keep our older humidifiers and, with these new filters, be assured of clean humidified air.
2854475
These filter cartridges are the best available and the 12-pack is the most economical way to buy them.  There's absolutely nothing to dislike about them!  We use them in a 75 gallon tank containing a large painted turtle -- a notoriously "messy" animal.  I strongly recommend these filters -- or the same brand in different sizes for anyone who wants to keep their aquarium crystal clear.
478123
As much as I hate the price on these filters, I love the fact that they actually do a good job of filtering. A lot of the cheaper off brands are pretty much worthless.
2915017
The last filters I bought from Amazon were worthless.  This is a very nice filter with excellent filtering capacity. This is a filter worth buying.
77079
I really like the Gobe filters I bought.  The quality is excellent, the case is top notch.  I recommend these to my friends.
380797
In 1971 My father and I had purchased an awesome Metaframe (Hagen) Dynaflo 10 hang-on-the-back filter which I used in conjunction with a premium undergravel filter in a 10 gallon Metaframe tank. The water in my then well-equipped tank had always been absolutely crystal clear. I had not known that Hagen now owned AquaClear which began producing filters since 1978 as I had moved to the Caribbean only a couple of years earlier. I anticipate that this impressive model shall now also serve myself and my children quite well.
281506
EcoBlueLife filters are the only water filters we use. We have tried others, including the factory replacements, but they don't perform to the level of perfection I demand. The water looks clearer and tastes better than any other of the EcoUeLife competitors. As far as I'm concerned, there is no competition to my EcoBlueLife filters.
992048
I have owned many brands of filters and this is the one I am most happy with. Highly recommend.