Tetra Whisper In-Tank Filter 20I with BioScrubber, 10 to 20-Gallon

I bought this from a local supermarket (meijers) about 2 and a 1/2 years ago, when i first got my aquarium. it is lasted sense then with absolute zero problems. well, actually it does have the tendency to get small, weak, and/ or sick fish stock to the intake grill, but that can be expected from any good filter. It has kept the water crystle clear. When i first turned it on, it was so silent that i thought it was broken. If your a begining fish keeper, i strongly recomend this product.

I've been in the aquarium hobby 35 years, and this little filter out shines others for its ease of changing filter medium, water filtration and biological aides. I hung this on the rim of my 8 gallon goldfish bowl and it does a great job keeping the water clean and clear. Unlike other in tank filters, this one allows you to add your own activated carbon or other chemicals to the inside pocket of the filter. You can also clean the filter and add your own carbon which allows you to not have to put a new filter in every time you want to change it out. That's a money saver, which also allows for greater flexibility on what you want to use for the chemical filtration (ie. carbon, or ammo balls, or whatever inside the filter).

As others have mentioned, this filter is not an object of beauty. It is what it is an in tank filter. Those who don't want to see a large black plastic filter in their tank.... well, duh... get one that hangs on the outside of the tank!

Also, the filter moves quite a bit of water (which for my purposes is ideal). But, if you have small fish fry or sick fish, the intake of the filter is likely to be too strong and suck them into the filter. So be forewarned. If you have healthy fish and are looking for the best smallish in tank filter, it would be hard to find something better.

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This thing is friggin massive. It takes up a ton of room in the tank. The reason why it's quiet is because the vibrations created by the motor are drowned out by the water around it. After all, it IS an internal filter, somewhat. The water flow is pretty strong. I ditched the flimsy biobags and black foam and just put in my own media instead (which is a lot cheaper and a hell of a lot easier to maintain). The advantages of the filter is that there's so much available space to put media, more than any equivalent HOB filter. the bad part is, it's in your tank and taking up valuable fish/tank space. It's sorta ugly, even though it's black.

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hI have noticed this product is internal and best fit to my tanks(30 gallon) . Then, i have bought two of this product and it works perfectly for " one time only" . Every time, i tried to remodel and reset up my tank. They BROKE AFTER TAKE OUT AND PUT IT BACK. I try to disassemble(An electric engineering student) this filter to figure out what is going on; apparently, I did not find any wrong about this product why it BROKE. The power is no longer running and giving the sound. Thus, I have to return/exchange. Now, I WILL NO LONGER PURCHASE TETRA INTERNAL FILTER AGAIN!!!!

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It works great. I don't have to clean the tank every other day, just once a week. Which is great.

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