high phosphate levels


Jun 22, 2007
wanted to know if high phosphate level could be the cause of a fc reading of 0. have taylor k-- shows tc reading and all other #'s seem to be up to par. have been shocking but still no fc reading. water is crystal clear. 25,000 fiberglass with a cart. filter. Any suggestions?


LifeTime Supporter
Nov 18, 2009
Sacramento, CA
Phosphate does not consume FC...algae does.

How are you shocking? What is your target shock FC? What are your numbers, including CYA? How are you chlorinating?

Bama Rambler

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2009
SouthWest Alabama
Phosphates won't cause your FC to go to zero. If you keep your FC level high enough for your CYA level (see chlorine/CYA chart) you can ignore phosphates.

What have you been shocking with?

You need to read Pool School on how to shock. You also should order a good test kit if you don't already have one. It will allow you to take control of your pool and things will go much better once you know the real numbers.

Other Threads of Interest