I gave checked ph and it's about 6.2. I've checked under the leaves carefully and np mites. I don't water the plants at all from the top. This is a DWC 5 gallon hydroponics system. Thanks for any help!
I use Cal- Mag - about 5 ml/gallon with brita filtered water that I let sit overnight before I use. I also use hudroguard....i thought it might be a calcium deficiency but adding alittle extra calMag did not really help....