markcobra Posted June 2, 2012 Report Share Posted June 2, 2012 Hello all, new member here and having some troubles. I can not hold any chlrine in pool. Pool reads 0 chlorine after heavy super chlorination. I'm pool owner for 3 years never had any problems. 23,000 gallon concrete pool with D.E Filter. Pool is almost 20 years old. All chemicals are at ideal levels via strips and 3 pool store test readings except free chlorine reading 0. Pool water is crystal clear and no one has been in yet this season. I shock with calchypo shock and use dichlor tabs. Latest test via Leslies. All test were comparable to each other. FC 0 TC 0 PH 7.6 TA 120 CYA 30 CAl hardness 160 TDS 500 Nitrates 2ppm Phosphates 300ppm. I put 1 liter of pool perfect with phos free in. Just got the Taylor 2006 kit. I did a 2 gallon bucket test with 1.5tsp of bleach and its holding well. I haven't done an ammonia test yet but I'm getting ready to buy 12 gallons of liquid chlorine and dump it in. Am I on the right path? from what I read it's ammonia and I have to burn it out. Thanks Mark Quote Link to comment Share on other sites More sharing options...
PaulR Posted June 2, 2012 Report Share Posted June 2, 2012 Do an overnight loss test. That is, test chlorine sometime after sunset, then again in the morning before the sun hits the pool. If you lose more than 0.5ppm FC overnight, then yes you have something going on in the water and you just need to keep dosing it until the problem goes away. Sunlight burns off some amount of chlorine every day, doing the overnight test will factor that out. --paulr Quote Link to comment Share on other sites More sharing options...
markcobra Posted June 2, 2012 Author Report Share Posted June 2, 2012 Thanks for reply. Tested ammonia first time and reads yellow 0. Problem not ammonia? Tested chlorine with Taylor 0 free chl. Nitrates 2ppm. Bought the 12 gallons of liquid chlorine. Should I dump? Quote Link to comment Share on other sites More sharing options...
markcobra Posted June 3, 2012 Author Report Share Posted June 3, 2012 Dumped 10 gallons of liquid chlorine 10% in pool around 9:00PM. All readings are sky high after an hour. Will check in morning. 2 gallon bucket test is still holding FC but loosing just a little since this morning in full sun. Its at 2.4 FC right now. CYA is 45 in bucket. Tested with my new K-2006 kit. Quote Link to comment Share on other sites More sharing options...
PaulR Posted June 6, 2012 Report Share Posted June 6, 2012 Wow, that would have boosted FC up into the 40-50 range.... should burn out anything! Has the pool settled down now? How's your overnight loss? Quote Link to comment Share on other sites More sharing options...
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