Negative Positive
Title: Too noisy
Review: This is the 3rd filter I've tried for my 15-gallon tank.The others being Whisper C and Marina S15.The Penguin 100 is the noisiest power filter I've had.There are two types of noise from this filter, the water splashing down from the wheel and the grinding noise from the impeller.The water splashing noise I can take, it's like a white noise in the background.The noise from the impeller is awful and there is no reason it's that loud. I read the instruction booklet and there is no suggestion in there to fix the noise.So after a day and half, I gave up and returned it.
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