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Hi all, have 2 fast buds growing at moment on a 20/4 light cycle, both in bio bizz light mix and around day 14 from seed. I've noticed that the plant on left is starting to lighten between leaf veins and the other one is perfect colour. Temps around 25°c lights on and 55%rh with a rotating fan...

55% rh , 24.5°c on a 20/4 schedule. 200w led 30" above canopy

Here's some more pics, reason I said nitrogen is because the right plant is curling tips

Next run I'll try coco

Only issue that could arise though is my tap water is very high in calcium already, if I add calmag it would definitely be too much

Thanks for helping, I'll give it a try

Hi all. Usually always have issues with my grows with over feeding, currently running 2 auto cheese from fast buds in bio biz light mix. With added perlite. This run I was planning on not feeding untill around week 3 or 4 as I generally get alot of burn so thought Ill give only water and PhD...

I I'm still doing some serious learning right now. I know it won't be accurate but would it not indicate that the soil pH has risen though(sorry if dumb question) as if the water is 7 and then rises when soil is added?

Yes a blue lab

Done a slurry test. Well worked with what I had. I PhD some dechlorinated water to 7. Mixed equal parts soil and water. After sitting for 30 mins I PhD tested it and was 7.8

Is it worth flushing at this stage of pH is high

I'm convinced it's pH problem, but it makes no sense as I always pH my water, let it sit with an air stone in for 30 mins then re test pH and I always get it to 6.4-6.5

Doubt it's the feed as I've tried various different nutes, from Bacs, shogun, biobizz etc. The only thing all the grows have in common is the water

I'll have to try next run

No I don't

638 ppfd at canopy

Been there, same results

Hey, I'm running one of these phlzon 200w LEDs( 190w draw). It's around 20" above canopy at 75% in a 1m x1m x1.8m tent