Tetra Whisper IQ Power Filter 20 Gallons, 130 GPH, with Stay Clean Technology

Using this on my 40 gallon tank with goldfish and a couple catfish! Keeps the water crystal clear without water changes!Also replacing the filter cartridges regularly is a scam. Wait till water barely flows through the filter then rinse off in (fishtank) water. Do this until the filter is falling apart then replace it.

This is awesome for my tank. Easy to clean and keeps the tank clean and moving. I’ve got a 20 gallon tanks with bata, neons and locked, los of plants. I clean the tank once evey 2 month or sooner due to algae mostly.

I like the adjustable flow, seems to work well fir my 40 gal breeder. I've only had it a few months but haven't had any issues. Nice and quiet, cartridges are easy to rinse if you have pressured water and are cheap to replace if you get the unassembled ones. Overall happy with it.

We got this filter for our new tank and loved the other reviews of how it sounded. We thought it was peaceful and such a perfect fit! Unfortunately one morning we woke up to one of our catfish missing.. we found him in half stuck in the intake filter. We didn’t realize that we were missing the guard to prevent the fish from getting sucked up (this was our first fish purchase as adults). I immediately called the company to see what could be done and they apologized for the loss of our fish and are sending over the guard to us immediately. They also gave some advice on what to do for now while we wait for the guard to come in. You can tell by the pictures the big difference. At first we just thought we didn’t get the model that came with the filter, but after thoroughly reading the instructions/the box, we realized we were wrong and it was missing. So please just be careful and double check !! Wouldn’t want anybody else’s fish going the way our catfish did. RIP Captain Jack 🙏🏼

This filtration system is so easy to assemble. It took less than 1 minute to get it setup and running. Of all the different hang back filters I've used, this one is my favorite and also quiet. I highly recommend this.

It works great with my 25 gallon tank & is very quiet. You don’t hear any noise from this filter .

After purchasing this filter I have not clean out the fish tank since and just change the filter and put more water into the tank

I wanted to try a different option after my Whisper 20i started making a rattling noise. It is about the same noise level as the internal filter (before it broke). I had to get the 45 version because the others were out of stock, and it just barely fits in my 30-long tank. I like the adjustable flow; it can be calm or turbulent depending on what your fish like. It is much less obtrusive inside the tank, but quite large outside. Bonus points for the easy-to-read instructions with replacement parts list. I think when this eventually breaks I will try a canister filter so my fish experience less noise in the water.