Cant figure out what is happening to my plant

So I have a fem WW that's about 6 weeks old growing in fox farm ocean forest. I just started feeding them 1/4 strength nutes about a week ago. I use distilled water with 3-4 ml of cal mag per gallon. I water about every 3 days alternating nutes and just water with the cal mag. PH'ing the water to 6.5-6.8. I'm growing under 400w mh, temps have been around 70-75 with lights on and around 65-70 with lights off. I cant figure out what's going on with some of my leaves. Theres no pattern to where the infected leaves are on the plant are. The very first one was towards the top of the plant and then one towards the lower portion got the same thing. Any help on what might be going on?

Did they have these spots before you fed them?

How long have you been giving cal/mag? Since the problem occurred?

Looks like calcium issue to me -either pH, need more or it’s being antagonised by whatever else you’re giving them.

Nutty sKunK said:

Did they have these spots before you fed them?

How long have you been giving cal/mag? Since the problem occurred?

Looks like calcium issue to me -either pH, need more or it’s being antagonised by whatever else you’re giving them.

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Yes they had the spots before I began using the fox farm trio. I've been using cal mag the whole time. I started feeding thinking that they needed to be fed with the spots coming up. And I have another plant to and it has a couple spots but nothing like this one.

I think your pH is too high and blocking Ca and likely more as it should have enough Ca. Very dark green leaves can be a sign of too much Ca. Too much P also blocks Ca.

Check out the chart for ideas.

OldMedUser said:

I think your pH is too high and blocking Ca and likely more as it should have enough Ca. Very dark green leaves can be a sign of too much Ca. Too much P also blocks Ca.

Check out the chart for ideas.

View attachment 4454253

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I've been doing the same thing to both plants, and one continues to get worse but the other isn't. I will try to get it lowered and see if that helps.