fhydro my suggestion would be to flush with 7.0ph and 0ppm water(distilled or RO) and then take readings of the flush water and see what you get. If you want get a commercial flushing solution I use Botanicare's Clearex. It's basicly glucose and water. Secondly the sick plants leaves look like they are getting shiny which is a for sure indicator of overfertilization.

Also, can you tell us what type hydro system you are growing in, it would help determine if there is other problems happening. It can all be corrected it just may put you back a few days.

check out the nice shiny leaves on this guys grow.

http://www.reefermanseeds.com/chatte...6674#post16674
gronnh20 Reviewed by gronnh20 on . PH too low This morning, i notice that at least two plants had a coloration problem. No green in the center of the new bud. I checked PH, it was 4 ans EC 4 also ! I flushed the containers and i put new nutes. Do you think i should have give them just water with good PH? Or is it good now ? Fhydro Rating: 5