My runoff is peaking! Please help! Rockwool top feed to waste

[Kermstax213]

Hey there my 4x8 tent, using two 4x4 flood tables, irrigating using floraflex top feed to waste. My temp is 82 in day and 73 at night. Steady 60-65 RH.
Currently in week 3 of veg (was going to flip but having some issues) in a sea of green. 24 6” Hugo blocks per light. Feeding for about 35 secs at a time which is about 100ml. Aiming for 3% shots.
Drybacks over night is at about 50-55% by the time my lights turn on. Currently 6 shots a day, last shot @ 9AM and lights off at 11AM. Maximum moisture content is usually 67-73% by my last shot/feed. My ph is at 5.8 and my ppm is 950. Runing athena pro line, with mammoth p, silica and black strap molasses. However my runoff has been coming out at 7pH the past 2 two days.... plants look healthy, can’t figure out what it is. Flushed them using Athena cleanse and hardly dropped down, 6.8/6.7ph. Any suggestions or ideas as to what I might be having issues with or doing wrong? My reservoir is at 69-71F. Using ac infinity 6” for an exhaust with two oscillating fans and a clip fan. I have good air circulation, pretty dialed in environment. I can’t figure out why or how my ph can be that high.... oh I’m recirculating my reservoir with a water pump, to air-rate it without air pumps to AVOID rising pH... help please

 

[kingromano]

your not doing enough runoff
salt naturally accumulate in the rockwool as it dries out
you want to give large runoff everyfeed to counteract this

you can recover the runoff but do very large runoff until
runoff ec/ph= feed ec/ph
(can take big volume, especially if you have accumulations)

 

[Kermstax213]

Hey guys thanks for the feedback and the knowledge!
I have a slight bit of algae on a couple of my cubes, just on the top (only on the 2” rockwool cubes) they didn’t get any algae on theHugo blocks cus I have floraflex caps on them. Which protects MOST of the light.
i use blue labs ph and ec combo meter and I use RO water as well.
I can’t get the ph to drop down... I’ve fed them at 5.2ph and even overwatered to get about 30% flush and they still won’t level out got the runoff stuck at 7pH and it’s driving me crazy.
Also I was examining the garden, and I decided to pick up cubes to make sure everyone has even water, and even checked the roots...I have some roots, but they seem to have slowed down and aren’t growing so aggressively any more...
I also noticed little white dots, that disappear when I touch them and I couldn’t figure out if it’s beginning stages of mold or PM, or if it’s just salt build up being flushed out?
RH is at 60-65, day temp 77-80F and night temps are 67-70F.
My reservoir is at 68-71F and I have plenty of air circulation and exhaust... any tips or clues as to how to fix my issues would be much appreciated

 

[Star Dog]

Completely ignore whats coming out, it's totally irrelevant and tells you nothing, using a low ph to obtain a desired runn off ph isn't the way forward, concern yourself with the ph going in.

 

[Kermstax213]

Some pics if u can help me out

 

[twentyeight.threefive]

Hey guys thanks for the feedback and the knowledge!
I have a slight bit of algae on a couple of my cubes, just on the top (only on the 2” rockwool cubes) they didn’t get any algae on theHugo blocks cus I have floraflex caps on them. Which protects MOST of the light.
i use blue labs ph and ec combo meter and I use RO water as well.
I can’t get the ph to drop down... I’ve fed them at 5.2ph and even overwatered to get about 30% flush and they still won’t level out got the runoff stuck at 7pH and it’s driving me crazy.
Also I was examining the garden, and I decided to pick up cubes to make sure everyone has even water, and even checked the roots...I have some roots, but they seem to have slowed down and aren’t growing so aggressively any more...
I also noticed little white dots, that disappear when I touch them and I couldn’t figure out if it’s beginning stages of mold or PM, or if it’s just salt build up being flushed out?
RH is at 60-65, day temp 77-80F and night temps are 67-70F.
My reservoir is at 68-71F and I have plenty of air circulation and exhaust... any tips or clues as to how to fix my issues would be much appreciated

Your plants look healthy and have no issues. I'd stop monitoring the runoff unless your plants are having issues.

It's only caused you to make changes that will cause harm to your plants, like feeding at 5.2 pH. Measure you input EC and pH, verify they are correct and feed to significant runoff.

 

[ProcessSpecialist]

Completely ignore whats coming out, it's totally irrelevant and tells you nothing, using a low ph to obtain a desired runn off ph isn't the way forward, concern yourself with the ph going in.

100% agree. Drain to waste was developed on the principle that the runoff is waste and nothing more. The pH is altered by the plant and media consumption and the associated reactions there within. Focus on your feed quality, which doesn’t have to be routinely adjusted as with recirc