(Bio)³

I used victoly's solution, the 10 came up as an 11 on all three of my probes. I have known hanna bottles and packets, tested acrosss a constant hanna probe, my apex and a normal hanna probe. I'll just leave my apex as is now, not like it matters to me

you have to be careful with 10 solution, needs to be stored in the dark and inside.

why you no tell me that, plus give me it in a clear bottle? I dont care its close enough