Tetra Whisper In-Tank Filter 40I with BioScrubber, 20 to 40-Gallon

I own 7 pet turtles. I have two red-eared sliders, four mud turtles and one map turtle. I use the Whisper 40i filters in all my turtle tanks. After trying several different types of filters (ie Zoo Med 501 and Reptofilter) for my turtle tanks, I have found that these work the best and are the easiest to use.

First of all, they do keep the water clean as long as you change the filter media regularly. How often it needs to be changed depends on the type of animal, or in my case turtle, that you own. It also depends on the amount of water in your habitat and other factors. The replacement media is fast to change and more inexpensive than the replacements for other turtle filters I've used.

The filter can be either hung on the side of the tank or completely suction cupped to the side. For functionality, I have found that tanks with shallow water do better with the filter sitting on the bottom of the tank and attached to the wall. Also, pets that are more likely to knock the filter down should have it attached to the wall instead of hung. When it falls in the water, the tank can become very dirty within a matter of hours. My sliders kept knocking one in the water and now the motor does not seem to work as well as it once did.

Make sure that your tank will have at least 4 inches of water in it or this filter will not work for you.

Overall, a solid product!

Had to buy 2 of these within 2 years, they don't hold up long enough for the price you have to pay, motor quit, it should last longer than what it does.

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Purchased 2 units--One each for 30gal. & 20gal. tank. No problem getting oversized units. Only problem occurs when mounting in tank where water level is at top. Used a small piece of wood to mount properly; however, as filter accumulates material, the filter starts to splatter some water. The 40i should have been designed with a cover to prevent this. I have simply placed a small refrigerator storage container over the filter top, and this seems to be the effective solution. Note that the filter is extremely quiet. I am continuing the use of air pumps in those aquaria.

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These pumps appear to work, but they make more noise than my hang-on-back filters.

I put two of these in two side-by-side 20 gallon aquariums. They are in my bedroom and at night, as well as day, I can hear the water gurgling. I fixed the problem by bending the filter cartridge back a little to overlap the water hole. That silenced them enough to live with. They still hum fairly loudly. I may sell one and get another Top-Fin 30 and keep the other as an emergency backup. I won't be buying any more.

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I bought this filter to go into a turtle tank. The design suggested that it would be suitable for this application. I have also had good experiences with other Whisper filters I've owned in the past. I have not been putting up with it for about 1.5-2 months. I loath this filther. First, the suctions cups don't stay on so the filter continuously falls into the tank. There should also be at least 4 suction cups. Having 2 placed in the center of the filter means it rocks back and forth and is not secure. Second, the bracket you can use in place of the top suction cup doesn't fit on the lip of my tank. So again, it keeps falling into the tank. If I can't return it because it's been used I may actually just throw it away. If you're looking for a good internal filter check out Ovation or Fluval. Don't waste your money on this one.

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