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I'm new to using this and made a mistake entering the chemical added to up the FC. I don't see a way to edit the data so I can correct the error - what's the best way forward?

I appreciate what you're saying, but sadly I don't have a decent test kit . The TF and Taylor kits recommended here are not available in Thailand (or at least I haven't found them yet) and so I've been making do and managing fairly well to date with just a Hanna pH meter and simple reagent set...

I think I may have added too much CYA so I've drained about 15k litres and am refilling now. Will run the SWG at maximum for a day or two and see what happens.

My pool is generally trouble free (more than I can say for the SWG :( ) with only a constant drift towards alkalinity to worry about. I dosed it with cyanuric acid last week to maintain the chlorine level and it all dissolved normally but yesterday the water took on a noticeably milky...

Thanks for your reply. I haven't got a recent test level for the salt but when this problem first emerged I added 50kg and it didn't seem to make a difference. My taste buds (and several years experience with the pool) tell me that there is very likely enough salt and that the warning is...

The cell is clean and flow is good but the low salt warning comes on frequently with no apparent relation to the actual salt in the pool. If I turn off either the SWG or the pump (along with it) and then restart it after 5 minutes or so, that sometimes gets it running properly and it produces...

Just a follow up... The OTO drop test has been very yellow since I added the CYA (looked like at least 3.0, but hard to tell as I think the scale is faded) and the pH has been steady at 7.7 according to my digital tester. A few days ago I turned the SWG down to 5 thinking that the chlorine was...

So far so good, I think. Last weekend I added 2.5kg of CYA with the aim of bringing it from 0 to 70 since my pool gets a lot of direct sun and has both the SWG and a waterfall (of sorts). I increased the output of the SWG to max for a three days also used a single puck of Chlorine that I had...

The pH is currently 7.7 and I measured it on the day I took the test sample for the lab as the same. I'm using a Hanna testing meter and calibrate it every couple of weeks to be sure it's accurate. Read my post and you'll see that there is some mystery as to why the original sample I gave them...

The lab that just did the test will give me another follow up one at no extra cost next month when I have made some adjustments, but I do want to get a kit of my own in due course. Unfortunately, when you can find one, the price of even the K-2006 over here is about US$160 - a full $100 more...

Needsjet, thanks for those links. The PoolMath tool looks extremely useful - is there any way of saving it in between uses so I don't have to re-enter the pool specs etc.?

Got the results of the test back this morning: My faith in the lab took a dive when I saw the measurement for pH as my readings for both the day of the sample and today are 7.7 so went to see them with my meter and a new sample. For some reason (they suggest where I collected the sample...

Sorry to have been quiet on this for so long but been away and unable to do anything. Yesterday I delivered a sample of our pool water to a new lab near here who are going to do what they describe as a complete set of tests and advise what steps if any need to be taken. The test is pretty...

Thanks for the super quick replies! My local shop didn't have a test kit for TA so I am planning to try another supplier this week. I'll post the results as soon as I have them.

The pool is beautifully clear since we drained and cleaned it a couple of months ago to get rid of calcium deposits that had formed over the last three years since it was built. Because I suspected the problem was down to high pH, I bought a Hanna digital tester to get a more accurate picture...