Thanks.

When the problem started a few weeks ago I was just leaving them in the solution way too long like all day. I've reduced the feeding time to 6 hours a day. I also increased one plants nutes and reduced the others but they both only got worse. About 2 weeks ago I reduced the nutes. It's only getting worse. Could it be build up? The ph rises so much that I start at 5.2 then at the end of feeding its up to about 6.0. How fast should recovery be?