Budget pick
Marina
Fish & Aquatic · Aquariums & Kits
Marina
Marina Floating Thermometer with Suction Cup
Budget pick
Best for: A cheap backup thermometer
A classic glass thermometer that floats or fixes in place with its suction cup — simple and inexpensive.
As an Amazon Associate I earn from qualifying purchases. Learn more.
What we like
- Very affordable
- No batteries
- Floats or sticks
Keep in mind
- Glass can break
- Harder to read than digital
Our in-depth look
Who it's for
Every tank as a backup, and quarantine or hospital tanks.
Tips
Keep it away from the heater for an accurate reading.
Questions owners ask
Is it accurate?
Good enough as a check; compare with a second thermometer if in doubt.
Can it float?
Yes, or attach it with the suction cup.
