So...with the TF-100 test kit, often there is a drop that causes it to be pink for a second and then clear.
The next drop might just be a little pink. One more drop and you have a good obvious color change.
Do you take the reading as the last drop or somewhere in between?
Question 2: My TA was 120 and PH was 7.8
I added MA and got the PH down to 7.2 and the TA down to 80-90 (depending upon the answer to question 1).
I set my return jets to agitate the water.
How drastic of a PH change am I likely to see?
As in....tomorrow, it wouldn't be very high if I let the agitation continue all night will it?
I am guessing I will be doing another (smaller) round of MA to get down in the 70-80 range.
I did get a solid reduction of 30ppm retesting about an hour after adding the MA.
And if it matters...I plan to add Borates soon. Just waiting on the test to come in.