yellow leaves, white roots

Using Ebb and Grow.
nutes at 1100 ppm +/- 200
ph at 5.8-6.0
Lucas Method with GH
fourth seek into bloom

My first grow went extremely well, 3.5 ounces a plant. Now however they don't look too good. The stems are spindly, the leaves are going yellow and the flowers are not as big with the exception of one plant. I am growing 5 different strains (all different than the first grow) with all but the one showing signs of stress. I have increased the watering times but that doesn't seem to be helping. Went from 4 times daily to six. Am I watering too often?
toward the last grow I started getting yellowing which I thought was too much nutes, 3200ppm! which is why I am trying more times rather than stronger nutes.

Suggestions please.

There is a long long list of things that could be wrong my friend and with out seeing your setup you will only get suggestions... i will list a few things to check and see how ya go...

Check ya nutes if you have them from the last grow - they do go off !

your lights are not to far away - the closer they are (but not to close to burn ) the blusher they will be as they are not shooting up looking for light...

root rot can be a mager killa

spider mite - check under side of leaves and fine webs...

get back if im telling you things you already no or if nothing has helped ya lol...

Make sure you drain the buckets out completely with each res change. I lift min with bricks so they drain back into the controller bucket. And six times a day with that system seems a bit excessive...are you using hydroton?

I am using STG, that white stuff. Not real impressed. I used hydroton last time and will go back to it.

I see now that I have spider mites. I have used the SM-90 as per instructions but still they persist! I hope I can save this crop.

spider mites?? go to home depot or lowes and buy a raid no-pest strip. its a plastic strip thats odorless to humans but gives off an odor that kills bugs, including spider mites.
however if you do a search on here your gonna find posts that claim there bad for you and its toxic. But if used CORRECTLY and RESPONSIBLY they can wipe out a spider mite population in a week.

Basically they did clinical tests on rabbits where they shot them up with a liquid concentrate of the active ingredient in the strips and they got cancer. But on the other hand they did the same thing with Sweet-n-Low and both rabbits and rats got cancer from artificial sugar, but it doesn't mean that its dangerous because your not going to consume 3000 packets of artificial sweeter a day.

so bottom lines is: no pest strips have a non-organic chemical in it that pwns spider mites, but the active ingredient MAY cause cancer in massive doses of liquid concentrate in animals.
ive been using them for a while now and i always take it out of my grow room 10 days before harvest just to be safe though and its also not neccesary if you dont have mites

Glad to be of service lol... and agree with frenetic on the solution