Leaves are still yellow with spots!

[Klaatu]

I have tried to upload pics, but this site was confusing and a pain in the *ss!
I've tried more Cal/Mag, and I started using Epson salts, and I flushed the shit out of them, and nothing helps.
They are 6 1/2 wks into flower and I'm sure it's effecting my potency.
This problem has gone on for weeks now and I've tried every suggestion but it hasn't stopped.

I have 3 Pure Power Plants (mostly sativa) in 3, 5 gallon buckets
I'm stuck using GH Floro Trio for nutes (@ 1/2 strength)
(YES, I know, I should be using soil frendly nutes. But I started in hydro so this is what I am stuck using for now.)
600W HPS
4' X 4' by 6 and 1/2' grow tent.
I add 1 tsp. Cal/Mag, 1 and 1/2 tsps. Epson salts
1/2 tsp. Micro, 1 tsp. Grow, 2 tsps. Bloom and a 1/2 tsp. - Hydroguard

[D.A.A.S.69]

Morning Klaatu , hope it ain't to bad this far along, pictures of your plants would really help us help you. Try changing your pictures sizes.

[Klaatu]

Please help!