Indoor how do you keep you ph on check??

[Krug]

Morning all! If I`ve run out of storage solution(for pen), is there an alternative, I can use(till I get a chance to buy some more)? Any advice/help appeciated...

 

[Duck Commander]

Here's a better price on the Accurate 8. http://www.horticulturesource.com/control-wizard-control-wizard-accurate-ph-8-p3015/

And another good one on pH. https://www.autoflower.org/f42/ph-information-1956.html

thx for the Link muddy very useful info:thumbs: