These phosphate tests use the most accurate method for phosphate testing: a 1 step, 1-minute, phosphate test. 20 tests per bottle. Even very low levels of phosphate can feed algae and create problems in pool water. Test for phosphate once a week as the concentration in the water can increase rapidly due to rain, debris or bather load. Results in a minute.
 
	
Easy to use and maintain your swimming pool or spa
	
Test for phosphate
	
Instructions and chart on the back of the bottle
	
Results in only a minute
	
20 tests per bottle
	
Low levels of phosphate can feed algae and create problems in pool water