Review on Aqueon Aquarium Cleaning Magnets: The Ultimate Solution for Effortless Tank Maintenance by Jenna Hicks

So I have 150 gallons it was a lot easier to slip in there and it cleaned but it also shook and came loose a few times but the seal it stayed on the glass. Now for 40 gallons you have to be huge to operate them, or at least use two hands. Erased everything inside without shaking or chipping. 20 gallons have to use elbow grease again, but it came up and did the job. work and not be too big for the tank. Overall since I got this for my large tank it has done the job but didn't stay attached and I have pliers in this tank so sticking my hand in the tank is a bold move.