Pool and Spa Test Strips with results in 15 seconds.

50 test strips per pot.

Tests for 
pH
Free Chlorine
Total Alkalinity
Stabilizer (Cyanuric Acid) to help protect against chlorine loss from exposure to sunlight. 

Also available as a bonus deal here

If you are unsure about your water chemistry or how to test your spa then see our videos on http://pinterest.com/hottubassist