In combatting algae problem, I supershocked; now I have free chlorine and

combined chlorine levels of at least 10 - for at least 3 days now. Do I reshock to get rid of...

I used to have a simple test kit for chlorine and pH. The chlorine test was just a matter of adding 5 drops of a liquid to the water and it would turn a yellow color you...

For the past 3 years our pool has gone into "chemical lockup". Twice last year. After treating taking a water sample to our pool service, purchasing 250.00...

Regarding inground pool, 20,000 gallons - chlorine would not register last year - emptied and refilled pool last summer with good results. At closing in September...

This is my third year with my pool (28 ft x 4 ft deep - circle). When I removed the tarp, it had a lot of brown sediment on the bottom and sides. I added 18 oz of...

why is this happeming

I have added 24 lbs of shock to my pool in the last 2 weeks and still no free chlorine showing up. My water is cloudy. What is the maximum amount of shock anyone has...

I have a 13,000 pool a year old and Ph and clorine have always been great. I am now having big yellow spots in the pool and hot tub which I can brush away but they keep...

How does everyone add their chlorine to the pool? a pool professional told me to add the chlorine - calcium hypochlorite granules- to the skimmer. when I did that the...

What exactly is free chlorine? Is that what's in the SHOCK or the tablets that my floating duck holds? Any help is appreciated.

I am operating an Olympic sized swimming pool at a recreation facility. The pool is not open currently due to pump problems. 2 out of 3 of our sand filters have burned...

I have a brown spot on my fiberglass pool where a chlorine tablet lay for a day I have tried lots of absorbic acid and oxalic acid nothing will remove it does anyone...

reguardless how much chlorine shock we put in our pool we can't get a free chlorine reading, even though total chlorine does read between 3 and 7.

I purchased a bucket of pucks in late August but never ending up needing them, so the bucket is still sealed. Can these be kept until next year & used. If so can...

I don't know the difference between, free chlorine and stablizer. My dip stick reads free chlorine is too high and stablizer is too low. What does this mean and how do I...

I recently bought a small 1000 gallon inflatable pool for the kids to play in. The pool shop up the street told me to shock the pool with one pound. I accidently put one...