The SuperFish aquarium thermometer is a standard internal fitting device. The sucker supplied is of reasonable quality and works well when new. This is the downside of this type of thermometer and while I cannot say for sure I expect this will degrade over time. However this is the same with all the others I have used and the external battery powered devices will run out of battery power eventually and often suffer from corrosion. The only alternate is to use magnets to hold it in place and while these are available in America the magnets are much more expensive than the thermometer.4 out of 5. Please bring out a magnetic holding version.
Verified purchase: Yes | Condition: New
Accurate and good size for my tank
Verified purchase: Yes | Condition: New
Very happy with this purchase
Verified purchase: Yes | Condition: New
Reads temp spot on
Verified purchase: Yes | Condition: New
Very good
Verified purchase: Yes | Condition: New
Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Best-selling in Meters & Controllers
Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Save on Meters & Controllers