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Coco runoff 6.9?

Depend on what was the ph going in? If it was lower it means your medium ph is way higher. If it was lower or the same then just keep watering around 6.2 - 6.5 to keep it in range
 
A flush must be done inside 20 minutes or else roots get flooded. If you already flushed you gotta wait till next watering. I would flush with ph 6 next time until run off is also 6 unless ph fluctuations are causing problems the only thing you will see is an increase in growth and nutrient intake
 
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This morning 10 wks
 

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And I personally like 6-6.1 going in (and out) .
Nice looking plant! She's worth the effort to maintain your H :)
 
Hi Jibbler

My auto's have slightly burned this grow and one I didn't see for 12 some hours and flushed it then it's fine. Like dwc to me change the water when in doubt.

If you have any run off over 6.5 just flush it then and stay on the same schedule it's worked fine for me.

Did you notice oz's grow he never did plain ph'd water feed them food every water and his looked great I'll find that link for you. It's Ozbud he's got to many posts to find it fast LOL
 
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I wouldn't worry too much as CoCo automatically stays at 7.0. Truthfully i only flush twice during my CoCo grows, once after flipping and once before the actual flush week. Only time I've ever had PH problems with CoCo is when i didnt let my tap water sit out long enough on my first grow. I get a better PH when i mix the nutes a day in advance for some reason. Peace!
 
Which nutes? I let it sit 20 hrs and it looked scummy. I'm using general hydro trio. First grow I was vigilant and the runoff was normally 6.3 Ish. Do you feed every water?
 
Flora trio as well, I've heard of other growers using water 3 days after mixing. I've high runoff 6.5-6.9 since i started growing and have had zero issues and good yields, everyone preaches 6.0 in and out but in CoCo its in and out so fast it doesnt effect anything. But as soon as i started letting my mixture sit overnight i started getting the lower 6.0-6.4 runoffs. Wierd i know but everyone's tapwater is different.
 
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