Thanks for reminder!Ph probe issues again.. I can't find a fox for probes being bad even when they cal fine.. It happens when the probes are older. When compared to a new probe they are off by .5 whit is a lot. I try to keep veg ph at 6.5 but looks like the real ph has been 6. After cal and set the feed to 6.5 with the old prob the new probe reads the same feed as 6.. This happens regularly.