PwnanObrien
- 79
- 18
Long story short, I need to re calibrate my Blue Lab meter but my local shop totally blows and never has the basics in stock.. My options are to order online, to drive 45 mins to the next Hydro shop, or to use some other solution that may be avail at hardware/grocery store that possibly holds a stable ph of 7 to calibrate my meter. Any thoughts are appreciated.