How to prevent fires from exploding bulbs or worse.

[ness]

I run my pH around 6.4 and I don't test my output though.

 

[WeedHopper]

Your in soil right. 6.8 going in is what I always shoot for.
Never really check my run off unless I'm having problems.

 

[LabRat]

I'm using LED's SF 4000 it runs 72 - 82. The only thing about the SF 4000 is it doesn't have a dimmer switch.

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Only my 3 600W digitals ballast have dimmers but I never use that feature.

Those look like how most of my grows end up. Taller than I meant to let them get.

Some meat on those bones tho!