Luquid,

I have suffered and am suffering from the same problem. From what I understand this is a PH issue due to high PH. I have not found a great deal of people that have the same problems are pictures to match. I *have* had a lot of people shouting it's 'this defficiency' or 'that defitiency'. While it is those deficiencies, it's due to nute lockout at high PH levels.

I've learned to keep the PH down at 5.2-5.5 to avoid this problem.

If you have early plants, there is less PH buffer in the solution so it will rise much faster.

Also, keep in mind that even though you may have changed the solution and fiexed the problem, you will see the after effects for a long time.

I'm absolutely amazed at how few people have this problem. It seems that if I let the PH get about 5.8 over night, I get the spots on my leaves. I'm still suffering the consequences.