Can this used to test bath water?

Since it will register up to 120 degrees and is advertised for hot tubs, spas and pools, I’m guessing that it would be right for the job. I use it in my heated swimming pool and it works great!

how long does it take to get an accurate reading

As long as it takes to pull the thermometer out of the water and read it.

Can the top be taken off so it sinks? I'd like to tie it to the ladder and get the temp reading deeper.

Yes. The top provides buoyancy and press-fits onto the thermometer. Separating them and the thermometer sinks like rock. To add a line you will need an eye fastened to the thermometer, or as you indicate "tie it to the ladder". No problem.

Every one I've purchased lasts only a few months. The thermometer comes loose from the backing making it useless. Anyone have this experience?

I have not had an issue with mine. I have had it for 5 months. It is in my koi pond. Not sure if a chlorinated pool would cause this.

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Description

🌊 Stay cool, stay in control—your pool’s perfect temp, every time!

BUILT TO LAST - Premium shatter-resistant glass ensures your thermometer survives every splash.
VERSATILE USE - Perfect for pools, spas, hot tubs, aquariums, and fish ponds—indoors or out.
DUAL SCALE DISPLAY - Effortlessly switch between Fahrenheit and Celsius for global convenience.
EFFORTLESS MONITORING - Large analog dial and floating design make temperature checks quick and hassle-free.
INSTANT POOLSIDE PRECISION - Get real-time water temps with a lightning-fast 500ms response time.

The eLander Pro Large Floating Pool Thermometer delivers fast, accurate temperature readings up to 120°F/50°C with a clear 7.3-inch analog display. Crafted from durable, shatter-resistant glass, it’s designed for all indoor and outdoor water environments including pools, spas, and aquariums. Lightweight and reusable, it floats for easy monitoring, making it an essential tool for maintaining your perfect swim experience.

Specifications

Brand	eLander
Special Feature	Large Display
Colour	White
Age Range (Description)	Adult
Included Components	Floating Pool Thermometer
Outer Material	Glass
Specification Met	CE
Display Type	Analog
Product Care Instructions	Hand Wash Only
Net Quantity	1.0 Count
Power Source	Battery Powered
Model Name	A15-EL
Item Length	7.3 Inches
Upper Temperature Rating	50 Degrees Celsius
Response Time	500 Milliseconds
Reusability	Reusable
Immersion Depth	1.2E+2 Centimetres
Style	Poolside
Indoor/Outdoor Usage	Outdoor
UPC	701979997550
Global Trade Identification Number	00701979997550
Manufacturer	eLander
Model number	A15-EL
Item Weight	59 g
Item model number	A15-EL
Resolution	1 degree fahrenheit
Are batteries included?	No

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