Rockwool DTW concerns

[Cactuspot]

I am trying to get some insight from people experienced with rockwool. I run a drain to waste system and the runoff has been a higher ppm and a lower pH. From my understanding this is from underfeeding because salts build up in the medium and become acidic.

I'm currently feeding 6 times a day and am in week 4 of flower. My shot sizes are 3-4% of the rockwool volume which is 160ml per. I have a 4" on top of a 6" cube with drip irrigation. Any help and advice would be greatly appreciated.

 

[Creeperpark]

Sounds like your drip is too slow and the nutrients are building up in the Rockwool. You will burn your plants if you don't flush them out with your reg nutrient feed. If that were me, I would use the same full-strength nutrient mix you feed with and flush the Rockwool one time and then return to the drip.

 

[Cactuspot]

I've been feeding with plain water and upped the times. I can't do a full flush because I have around 200 plants there

 

[teomatiz]

Hello , I am new here!

 

[Creeperpark]

I've been feeding with plain water and upped the times. I can't do a full flush because I have around 200 plants there

HOw are you doing now?

 

[Creeperpark]

What have you come up with to lower your EC run-off Cactuspot?