Fluval U4 internal filter

This filter works well, but needs to be replaced almost yearly because it breaks easily. We were upset this time because Amazon shipped it in a soft mailer, so the box was beaten up, and when we opened it, it had obviously been...View More opened already. All the packing material was missing and the charcoal filters were exposed (and therefore useless). Very disappointed in Amazon here. We kept it because it runs but we will probably purchase elsewhere when it inevitably breaks in about a year.View Less

I purchased what's called a bookshelf tank. It is 35 inches long and about 9 inches deep. I set it up with two sponge filters on either end and it just was not cutting it. I had a dead zone in the middle. I replaced the...View More sponge filters with this pump and let me tell you, it is awesome. Whisper quiet and just enough power to shoot the water gently across to the other side of the tank. I couldn't be happier. It's adjustable also which is an added bonus. Highly recommend.View Less

I thought fluval were an English mark and very disappointed to find it’s a foreign plug, product very good though

Pulled the cartridge filters out to replace during normal water change in tank. Filter stopped working resulting in 3 fish dying because I couldn't circulate the new water through the tank. This filter has no indicator of...View More whether or not it's working so I didn't realize until it was too late. I only knew something was wrong after about 12 hours and I noticed the water was getting cloudy.View Less

The filter came damaged while the box looks good