Baffled ... Issues up the yang! Any advice?

Ok so I posted about this plant earlier having rust spots here: https://www.rollitup.org/marijuana-plant-problems/424393-mag-deficiency-not-sure-any.html

Here's some pics of what it looks like now:





Now the plant is having some issues with the leaves getting eaten away. Only the top leaf of one plant though. Iono whats up. We are 2 and 1/2 weeks into flowering. The PH is fine, 6.8 when i water, runoff is about the same. Using Fox Farms Big Bloom and Tiger Bloom nutes every other watering (About once a week) They are under a 1000w HPS that's 22" above em. Closet Temp is 74-77 degrees with the light on. Anyways, after I posted that thread I flushed the plant in case it was nute burn just to be sure. Now I check it and here we are:

Here's some pics of the Issue:



Here's pics of the whole plant:




Now keep in mind this is just one plant. The other plants have some small rust spots that are on older growth but doesn't seem to be getting worse by any means. This gal is just confusing me. Am I worried about nothing? Is it normal for something like this to happen? I'm going to go get a Microscope tomorrow to check em out and make sure there isn't bugs. But I don't think this is a bug problem. Please any help and advice on this!!

Also, I mention in the other thread that I never foliar feed/spray. Should I be doing that and could this be a possible result of not doing it? Also I have these rocks that i put on top of the soil to help with the water not digging huge hole into the soil like so:




Now could that also cause an issue? Just trying to give as much info as i can. Again any help and advice would be greatly appreciated

Looks like something took a bite out of it. The plant looks otherwise healthy. I've had it happen like this too. Lights go off for 6 hrs and when I go back in the morning, the canopy has this damage. I didn't treat anything and it never happened again, like some large insect took a stroll through your garden.

I think ur "bugging out" over nothing. This plant looks GREAT! r u not using a calmag type fertilizer? if so u shouldn't run into a calcium deficiency.

they look great, if it doesn't progress, I don't think you have any worries.

Vibrant looking plants, I'm sure they will be fine.

Well hmmm, I'm using Ocean Forest soil, not sure if it's calmag soil like punk mentioned, just kinda freaking out over the rust spots and then these chunks of leaf being eaten away.

Sooo update, went to the grow shop here in town to pick their brain and I guess I've been checking my PH wrong, Apparently when you ad nutrients to the water it lowers the PH and needs to be corrected. Woopsy On top of that he said it would be a cal/mag deficiency before anything else, especially if I'm using local tap water here. Prolly a combo of both. Said there shouldn't be spots of any kind on yer leaves. Smart guys I'm telling ya

duh...lol, & I think I already told u that (r u not using a calmag type fertilizer? if so u shouldn't run into a calcium deficiency.)

thexception said:

duh...lol, & I think I already told u that (r u not using a calmag type fertilizer? if so u shouldn't run into a calcium deficiency.)

Click to expand...

Well I said i was using Fox Farms Ocean Forrest, but for nutrients/fertilizers I'm using Fox farms Big Bloom and Tiger Bloom, they both have .5% Magnesium and Calcium in them, so not sure if that would make them what you are talking about.