YoRgH
0
Hé he water here is always free, from the sky or from the hoseWell, Im getting tons of rain tonight free water!!!
Hé he water here is always free, from the sky or from the hoseWell, Im getting tons of rain tonight free water!!!
Hé he water here is always free, from the sky or from the hose
Once you get a CYA reading, we'll know how close the math was.
In the meantime... your TA and pH are very low. You can go Borax and Baking Soda, but Washing Soda/Soda Ash/pH up will do it all for you with just one chemical. If you can't find Washing Soda in the laundry aisle somewhere, go to the hardware store or pool store and buy some pH up. It should show the ingredient as Sodium Carbonate, not Bicarbonate.
Add 1.5 Kg of Washing Soda and let it mix and recheck it. It might need more, but HUGE adjustments are difficult to calculate and you don't want to overshoot. Let it mix an hour or so with the pump on and maybe brush a little before retesting. Take it up in steps until the pH color starts to look like something in the middle of the tester.
DANGIT!
Did you run the pump to mix up the water before testing?
There is a lot of error when you start diluting the test ... and it is logarithmic scale, so even a little below the 100 is a big CYA jump.
You do not know what PoolMath was recommending was right because you do not know how high the CYA started.
And you can not just add up all the smaller fills and say they are the same as a single drain and fill because in subsequent drains the CYA has been diluted.
If you drained 1/3 and filled 3 times. Your CYA would then be 30% (0.667 * 0.667 * 0.667) of where you started .... even though in total you added 100% of the capacity of the pool.
You have to just keep draining and replacing until the CYA is reasonable ... and then remember this pain to avoid the same problem in the future.
You have the best CYA test.
Let me ask you, why does it matter how high the CYA level is? If it is 500, are you going to be able to drain more than you have been? No. So just keep draining what you are able to, refill, circulate, test, repeat until you get a good CYA number.