Does this sound like over watering?

[rastaman79]

What do the roots look like?
I'd say that there is a good chance you're overwatering. But I have other questions.
Couple things-
-What is the pH of the runoff?
-Are you aerating your nute solution?[attachment=o166852]

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I have not grown in RW blocks but I want to say that your water application sounds excessive. I hope someone who is a RW grower will chime in.

Thanks stinky.The brown spots seem to be subsiding,as ive put a smaller outlet pipe on the pump,but now it seems that I have a mg/cal problem due to lock out maybe because of low ph5.4/5.5(I read that both mg/cal are absorbed better at a higher ph(5.8) so im bringing it up to that.My roots look fine(white,lots of).Yes I do have airation in my res,and I add h2o2 every 3 days.Ive still got a few limp lower leaves and the deficiency,is on the upper parts of the plants,hope this helps diagnostics.whats the best way to deal with this?Sorry for the crap pictures.Thanks,RM.