URGENT need assistance with possible nute burn

So I have 2 autos underneath 600 watts of MH. Distance 24inches from canopy. Cool tube, 6 inch exhaust. Temps around 75-77 with humidity at around 60%. Running ultimate organic promix with 30% perlite. Ppm of soil runoff is 550 and soil ph is 6. I fed them twice consecutively last week with a very light mixture of jungle juice micro-grow-bloom, probably 1/4 strength or less. I don't think I have been over watering. I pH all water that goes in and use tap water ran through a Britta that tests at 46ppm and I pH down from 7.9 to 6.5 with every water/feed. It's been a little over a month since they sprouted? They seem very small and the leaves are really starting to yellow on one of them especially, with the tips curling up towards the light. Does anyone have any idea what's going on? Thanks in advance.

yeah, you nute burned them. First off, forget reading run off of anything, that tells you nothing. Also, there is enough nutes in the pro mix to last them about 3 weeks. then they can start small amounts of nutrients. I would just give them ph'd water for the next week or so.

Looks like you need to start over,

Do you guys think a flush would shock them or possibly be beneficial?

GuruNation said:

Do you guys think a flush would shock them or possibly be beneficial?

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water them till you get a good run off ,set them under the light and hopefully see some new growth soon.

Word thanks man. One last question, since this nute burn is somewhat severe, would you recommend waiting until normal watering time (which wouldnt be for a few days) or do you think I could water today with just the straight pH'd water to get this solved faster? I'm just worried about drowning them I guess since I just gave them nutes/water not long ago.

jeez man i thought those were maybe a week from sprout you may have duds

GuruNation said:

Word thanks man. One last question, since this nute burn is somewhat severe, would you recommend waiting until normal watering time (which wouldnt be for a few days) or do you think I could water today with just the straight pH'd water to get this solved faster? I'm just worried about drowning them I guess since I just gave them nutes/water not long ago.

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I would go ahead and water them and hopefully that will dilute the salts enough and they can recover. they are gonna just have to sit there for a while and try and recover.

dirtWeevil said:

jeez man i thought those were maybe a week from sprout you may have duds

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Lol I know right. black skull seeds genetics not pointing fingers