Salt Build up Causing this or ph imbalance??? please help

A

allenkillbud1er

Member
Hi
I have been vegging for 6 weeks. I am using rock wool cubes and they are sitting on hydroton. I noticed the plants started looking funny and thought it could be a salt build up or a ph imbalance. I flushed a few times with quarter strength nute solution and they still look the same.

I am using ro water- A & B, CAL MAG, a small amount of VITAMAX PLUS and FULVIC ACID (Fullpower)
ph at 5.7
ppm 500

this is my 3rd grow with Rock wool I have used the same nutes but this is the 1st time I have had this issue. my run off was high 750 ppm and 6.5 ph.

how can i fix this?
Any advice would be greatly appreciated006.jpg004.jpg
 
lahadaextranjera

lahadaextranjera

Well-Known Member
How much Ca/Mg in relation to the nutes. Too much can lock out the primaries. Ur PH is too high at 6.5. If ur run off was higher that shows u there's build up.
 
A

allenkillbud1er

Member
i am using cal/mg at 5 mls per gal. ro water.
ive been watering at 250 ppm for over a week now
how do i safely lower the ph? do i continue to water at 5.7 till it balances out or drop it to 5-5.5 (scared to give it low ph)
my run off is at 6.5 ph and 500-750 ppm after every 250 ppm water. wtf should i do bro?
thank you
 
DeeTee

DeeTee

Well-Known Member
Your ph is way too high, I too use rockwool and adjust my ph to 5.8 and have no problems. Drop you ph it's too alkaline. I think that's your main problem.
 
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