@WeedHound - In my 40g resv.there is no CalMag in the mix. Its 30 gallons [email protected] Tap (no brita) and [email protected] Ionic Grow.

I couldn't tell you what it was, kind of almost a sandy type of sediment, it could have been from nutes or my water I'm not sure. I think you may possibly be right about adding alittle CalMag however, before I came to work the plants were still looking droopy and they hadn't been watered yet this morning, I'll let you know how they look after a couple of waterings later today...if they are still droopy I may consider adding like 1ml/gal. CalMag to my 30gal. of water I have in there right now. I think that would probably bump me up to alittle over [email protected] total in the resv. What do you think WeedHound?