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Is there an ideal level that FC should be at after adding polyquat 60? I added the Polyquat 60 when the FC was at 1/2 slam level and will let the pool motor run for 24 hours. I have read that you should not adjust the FC after adding Polyquat 60. I am just wondering how stringently this rule...

We just opened our pool on Friday evening June 2, We were able to test the pool water for stabilizer, pH and alkalinity and then added 10 L of liquid chlorine at 10.8 %. Per Pool Math this should raise the chlorine in our size pool by 10 ppm. The water was fairly clear; we do not see algae but...

We are getting close to closing our pool for the season and added dry stabilizer to increase our CYA from 30 to 40. We had been running CYA most of the summer at what we thought was 30 CYA per TFT pool test kit. We only use liquid chlorine and do not use pucks or other stabilizer. Gradually...

Our very reliable Hayward sand filter tank started to leak under pressure i.e leaks more in filter setting than in recirculate. When we replaced the o gasket we noticed hairline cracks under the tank collar. Does anyone have recommendations for repairing hairline cracks in the neck of the...

I sent a supoort request 061222 but I am not sure where to look for my request or for a reply. It was not sent on this page. I am repeating my support request here. I have a Pool Math App downloaded on my iPad and I have a paid subscription. I am able to use the app on my iPad. I would like to...

Having owned a pool for many years and having researched the many articles on this site I feel bit silly asking this basic question but I would like clarification regarding the level of Free Chlorine for daily maintenance with a CYA of 30. I have the CYA/Chlorine Chart and when looking at it...

We just opened our large 36,000 gallon pool. Pool opening test results were FC 0 pH 7.2 Total Alkalinity 80 CYA 0 Pool temperature 70 F I expected our CYA to be on the low side but not 0. It ran low all last summer and was 35 when we closed the pool in September. We have to drain...

Thank you for the recent you tube video about closing pools for winter freezing conditions; Winterize Your Pool With Trouble Free Pool on Aug 28, 2021. We are preparing to close our pool in Southern Ontario. We use a mesh cover; our CYA is 40; we have balanced the pool water, then slammed the...

Our CYA is 20 and our pool looks great. Our pool water is clear and all other test results are within target levels. We understand that TFP recommends a stabilizer level of 30 to 50. We are debating if we should raise our stabilizer to the recommended level of 30? ; or, should we leave well...

mknauss Can you please explain your reply? I also thought that liquid chlorine can increase either the pH or the total alkalinity? I having been using liquid chlorine for many, many years. I have been using the the SLAM process and a TFT 100 test kit for many years with great success. I need...

Hello, I am trying to decide between a Stenner pump with an ECON-T (timer pump) for dispensing a predetermined amount of liquid chlorine versus a system like the automated Pentair IntelChem system. My concerns with the Pentair IntelChem are that I have read many negative comments about it...

I am seeking information about automatic liquid chlorine dispensers for an outdoor residential pool. The only one I have seen is Hayward AQL-CHEM4-CHLO Sense and dispense System. But I have not been able to find any reviews. We are getting tired of having to add liquid chlorine every day and we...

I just added Pool Math to my i-pad. How many logs can I save before upgrading to premium? I want to use learn how the app for a while before I upgrade. Thanks. Jackie I have been using the website and the old calculator in the past.