What is going on here

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Bigdave78

New Member
On my second run growing northern lights auto from 00seeds. Medium is DNC water only living soil so all I've done is watered when dry. Was told I didn't need to PH my water so I haven't probably my first mistake. Light is a mars hydro tsw2000 led. In 5 gallon smart pot. Day time temp is 78° night time is 65ish, RH is 45. Long story short all was good until about a week ago I started to see some spots on the older fan leaves they never really spread or anything. But this morning I opened the tent to leaves curling up at the top of the main cola and brown spots have gotten worse and crispy. Here are some pics of the affected leaves I plucked off and the plant. Thanks in advance hoping to get this sorted out she's my biggest plant I've ever grown and I don't wanna lose her.
 

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Bigdave78 said:
On my second run growing northern lights auto from 00seeds. Medium is DNC water only living soil so all I've done is watered when dry. Was told I didn't need to PH my water so I haven't probably my first mistake. Light is a mars hydro tsw2000 led. In 5 gallon smart pot. Day time temp is 78° night time is 65ish, RH is 45. Long story short all was good until about a week ago I started to see some spots on the older fan leaves they never really spread or anything. But this morning I opened the tent to leaves curling up at the top of the main cola and brown spots have gotten worse and crispy. Here are some pics of the affected leaves I plucked off and the plant. Thanks in advance hoping to get this sorted out she's my biggest plant I've ever grown and I don't wanna lose her.
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It looks good for a non ph watered plant but ph balance is really important. You can use rainwater as well thats what i am doing just make sure its fresh and not full of bugs
 
I've been wanting to lower my PH in the medium since the run off was 7.4 last week just don't know how to do that with living soil without messing up the medium.
 
I tried the non ph thing with my soil because I grow organically just to see what would happen. Sure enough, about 3-4 weeks into flower, started to see the same spots and discoloration. Soon as I ph’d to 6.5-7, it all stopped. Now I seriously doubt your harvest will be affected by not ph’ing, but I didn’t want to continue to not ph to find out. I was already heavily invested and didn’t want to ruin a good thing. Won’t kill you to ph.
 
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