"I love this thermometer because it is so easy to use and read. Once you stick it to your tank it tells you immediately what the temperature is. I recommend this thermometer to anyone who is starting"... (read full reviews)

Petco Thermometer with Suction Cup Reviews (41 reviews)Buy Now

Overall Rating:

"It is very easy and clear and works great so far...using for a week."... (read full reviews)

Petco Stainless Steel Thermometer Reviews (9 reviews)Buy Now

Overall Rating:

"have 2 of these and both accurate but neither fits the rim of the tank (29 gal and 55 gal). The lip of the metal rim is not long enough to fit over frame of tanks. I used spare suction cups from"... (read full reviews)

Petco Aquarium Hydrometer with Thermometer Reviews (6 reviews)Buy Now

Overall Rating:

"This hydrometer is accurate enough for my purposes and reasonably priced."... (read full reviews)

Petco Glass Thermometer Reviews (7 reviews)Buy Now

Overall Rating:

"I just got this thermometer today along with a heater from another store and it's been measuring the temp fine! It doesn't float to the top but it bobs around inside the tank, which doesn't actually"... (read full reviews)

Petco Outside Thermometer for Fresh & Marine Aquariums Reviews (15 reviews)Buy Now

Overall Rating:

"Don't waste your money on this thermometer like I did. An hour after I applied the thermometer to the tank, I didn't see any changes. After several days, and then several weeks, there was still no"... (read full reviews)