Hey guys I don't know it this is a mite problem or what it can't be spidermites I delt with them before the undersides of the leafs looks clean I'm growing in dwc using general hydroponics 2 part what do you guys think my issue is
Looks more like Nutrient burn with the browning on tips and edges. What EC are you running and under what lights?
If you had mites you would easily see them walking around on the underside of the leaves and I don't see the telltale little white spots on the leaves.
This Is Classic DWC PH DRIFT Symptoms , your ph has gone a little out of whack, so you are seeing calcium lockout, along with whats usually associated with that , a phosphorous def.
ALWAYS always keep the ph stable in dwc. The spotting on a couple pics may just be a ph drift potassium lockout as well.
This is why rdwc exists, because its a pita to check these buckets 2-3 times a day , so you share the solution and monitor just the res. When you are growing 2+ different genes in dwc , each one is an individual bucket with its own needs, feeding, and response. So one bucket could be fine while the next is fucked all out of whack. I highly suggest you read some of Snypes work in the rdwc tuts he did here. His info is very relevant to your dwc and many many of the icmag dwc fam are still posting on his threads.
Im glad I dont need to fuck with all that anymore, organic growing just makes it ez for my growing style