JW Pet Company Smart Temp Standing Thermometer Aquarium Accessory

I received this thermometer today and placed in my aquarium right away to test if it does in fact stay down as the description says, you'll be glad to know that it does stay down.

The fins you see at the bottom serve as an anchor, the fins have weight and are shaped to help the thermometer stay in place, but be sure to gently push the fins into the sand or gravel.

I have a wave maker in my tank that creates currents from two different directions every 2.5 minutes, the thermometer did not move once and hasn't since I placed it in the gravel.

The thermometer has both readings in Celsius and Fahrenheit on a white background with a "green safe zone" area in the middle. Reading temperatures is very easy, the visibility on the thermometer is very clear.

As for accuracy, I can say with confidence that the water temperature is displayed with minimal margin of error, if any, probably + or .2 degrees. I have a digital thermometer with a probe and both displayed the same temperature.

The overall construction of the thermometer is of very good quality and materials, the housing is made of glass and the fins of plastic, not sure what they used to give weight to the fins, but it works, it does sink and stays sunken.

Nowadays is hard to find good aquarium thermometers, they are either inaccurate or brake easily, this one however, even though is made in China, seems to be well built and I expect it to last. Hope this helps.

Ok...the reason I like the "rocket" so much is...

1) Unlike glass hanging thermo's there is no suction cup that fails after 2 weeks or top hanging thermos which only test temp at the water surface

2) Unlike other substrate based thermos, they don't constantly spin. These have "rocket" fins which anchor it in the substrate and prevent spinning.

The thermo is otherwise no different than most other non digital type thermos. Easily readable and relatively accurate.

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Stays at bottom of tank as advertised. Accurate reading, but numbers are very small so a bit difficult to read. Blue bar indicating "ideal" temperature is helpful.

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I was looking for a good thermometer for an acrylic tank. The stick-on types aren't accurate unless your tank is glass and the suction cup types just don't stay put for long. So, I chose this glass, standing model.

It's an accurate thermometer that stays put at the bottom of the tank. The cory catfish appreciates that food gets stuck by the base and he cleans it away without the thermometer budging. Very happy with the performance and the kids think it looks like a rocket.

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What is a thermometer supposed to do? It's supposed to measure temperature. Well, I'm sure this measures temps, but I can't tell what they are. The scale is unreadable. Mechanically this looks like a decent product, but the water temp could be 60 deg or 90 deg, and I wouldn't know without sticking my finger in the tank. It does have a green zone on the scale, but it's not clear what temp range that covers. I wouldn't buy another one or recommend this product to anyone.