2-in-1 Aquarium Magnetic Cleaner with Digital Aquariums Thermometer, Fish Mini Magnets Brush only for Glass Tank,Tiny Magnet Floating Cleaning Tool for 1-30 Gallons

I have these on all 8 of my tanks! They are so perfect! They typically temp within 1 degree of my other aquarium thermometer so I trust the accuracy. The algae cleaner is good. It has really gotten off some stuck on algae for me. I will say that I wish they made a larger version of this because it looks so small on my 125g tank 😂

Wonderful product, cleans the glass and checks the temp. Very useful for smaller tanks.

Works as described

Comes ready to use right out the box, worked like a charm to clean my 5gallon fish tank in under a minute. Temp is accurate as well, matched it up to the in tank thermo and they were reading the same! Great fit and finish as well. Super strong magnets keep cleaning pad right where you need it!

Works great. I dint get how some reviewers here talk about it scratching glass. It's made of the same glass scrubbers as any other glass cleaner. Sounds like some are letting sand get in the scrubbers which will scratch glass. I love mine. Temp is accurate, within a degree or two, verified with 2 other thermometers. Want to change between F and C? Hold the power button for 3 seconds. It's great.

It accurate and works well

I like the cleaning since it is easy and now I do not have to stick my hand in the tank anymore. Though the abrasive velcro is too sharp and it scratched my betta. Other than that it is okay.

This thing is great! Tested it with 2 different thermometers I know to be accurate and it's always within 0.1 degrees! Also works super well for scrubbing the tank glass, looks nice, and scrubs even super hard to clean spots easily. I was hesitant when I saw it to be honest, but it ended up being great for my 5 gallon shrimp tank. I'll probably buy a second here soon for my 30 gallon cory tank.