Its mycelium and a good thing in living soil. Just wipe it off. As long as it is white, ypu are good. If it gets black or green, then worry. 
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I move the soil around a little on one pot I seen a small taproot coming out I did soak these one I just directly planted cause I lost my other 6 by accident in a bigger thing of soil so I was mad and just dropped them straight in figured slower start but whatever I was upset lol but at this point I’m curious to see if the light will suppress it and kill it off I think the HLG 650R have UV in them
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It’s pure white fuzzy strands
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I got it on my soil tube when the water in the bath above ran over and flooded the down stairs. I keep a tarp over it and didn’t realize water got into it. No problems with it like @ReikoX said.
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Did you put any sort of probiotic or anything in your soil where it could be the mycelium?
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After ReikoX mentioned it I looked into it more and it definitely looks like it! Wonder if the light will make it retract back into the dirt? My buddy is wanting to come over this weekend and take a culture of it so I can have it on the ready
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What did you put in the soil that you think caused it?
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I’m thinking the fish sh!t helped a lot here but I had it in a corner under a heating mat in the dark mostly just watching it waiting for it to sprout then I was going to move them under the light but I already did that now after I freaked out thinking it was mold
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So 30 sec off and 30 sec on?
or a different duty cycle?
Cheers
G
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I’m running 15 on 30 off but I also have a air stone going continually not sure if it makes any difference just thought I’d throw that out there .
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The longer off time helps speed the root growth I’m guessing the dry time forces the roots to hit the water quicker!
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https://weedseedshop.com/en/blog/fix-wilting-drooping-cannabis-plants/
This might be a good read, I’m really not sure, but could you have wilting leaves? Meaning under watered actually?
Might want to wait for others to chime in if you don’t know.
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I would say they’re more getting a claw form than the droop the other one doesn’t seem to be affected by it I recognize the droop from the wet dry cycle I’ve tried and this doesn’t look quite the same like when they’re drooped you can water them and they perk up with in hours these don’t the soil is moist enough for those damned fungus gnats to make a small appearance just seen a couple of them and I only watered them once a week while in the pots
Wondering if there’s too much nitrogen have you tried cutting back on the ppm to 3/400 ?
Or bottom watering might help worth a try.
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I only fed them that alaskan fish shit one time 27 days ago and they were like this before that already
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Maybe you could try either some Humic acid (helps with ph issues amongst other things) or maybe even some OHN from Korean Natural Farming?
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Interesting I need to look more into that korean natural farming I do have some plant probiotics on hand for the time being and humic acid but I wasn’t sure the best way to use humic acid foliar? top dress? watered in?
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If it’s soluble humic acid, water it in, its microbe food.
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Great post, just saw it.