Yellowing W/Brown Spots, Major Foliage Loss

deflator

Active Member
Hi all, newly legal in Michigan. Having a problem maintaining my fan leaves and it has crept to the bud leaves.

Pertinent info:
Diesel Ryder
40 days old
600w HPS on a 20/4 schedule
65*F low 78*F high
~33% RH
Distilled water
Pro-Mix HP medium

Food:
Fed two out of 3 waterings.
Ionic nutes at 75% strength, started at 50% at 15 days old. Green Fuse at same ratio.
Started mixing 50/50 (3-2-5) of the veg and bloom versions of these two at about day 25.

They have been seeing about a 5-3-8 ratio of NPK lately.

I thought it was a Mn deficiency at first coupled with N def from moving over to mostly bloom nutes. I tried an experiment and added 25mg of chelated Mn from a nutritional supplement with no slowing of leaf loss.

Now I'm losing leaf color like mad on the 3 youngest plants. Brown spotting from the middle and yellowing from the tips leading to death. I know its common during flowering but how can I stop it? Leaves are what make the flowers! Am I feeding it too much?

On a side note, my oldest (45 days) and healthiest has a lot of odd color, the top longer bud leaves all have interveinal neon orangey-yellow on the tips of the main cola, and purple on one of the lower colas...normal?
 
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