I alread tried the search function but the very mention of PH, the server said too common.
So need to bug you guys, sorry.
I can't remember which post it was ( I read too much within too short period of time ) but I think if a TA test conducted and the color suddenly changed to ???? color that means "something" was way too low. Is that "something" = PH ?
The PH tester we have is 6.8 as minimum, how do I read lower than that ? Or what can I use to detect if PH is lower than 6.8.