plant issues wanting advice

I just did a rez change and noticed that my girls (at least one) are developing brown spots on them. They are in the first week of flowering and I have just noticed this. I was wondering if anybody had any input on what might cure this issue? I am using the Lucas Formula as well. Any help would be appreciated!!! This is also a bubbleponics system with 2 14" aerator bars.kiss-ass

looks like nute burn bro
did you clean out your reservoir well?

Mr.EyezLayLow said:

looks like nute burn bro
did you clean out your reservoir well?

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Yes I cleaned it pretty well.
When I look at some of the pics in the problem section it almost look like it an ozone problem, since it they do sit about 2 1/2 ft away from a gas water heater, and there is also the AC unit in the same closet. Does anyone think there might be an issue with maybe the fumes from ater heater if there are any present?

No. I can't get into detail exactly why, because honestly I forgot. But I was doing a lot of research on the effects of propane on plants. I found out propane is completely safe for plants as they absorb it and convert it to Co2 (I think). But carbon monoxide was also the same. It is only harmful to humans and animals. It has to do with the whole fact plants use Co2. I really don't remember the specifics though.

Mr.EyezLayLow said:

looks like nute burn bro
did you clean out your reservoir well?

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No it doesnt! U might want to raise those eyes up a bit before u start tricking people into more problems. I'd love to hear why u think its nute burn, because I didnt see one thing that looked even close to resembling nute burn.
Anyways, its calcium deficiency. I use Lucas formula and when my ph gets a few points high I start to have calcium, and potassium def. It may be time to calibrate the meter?

Phelps said:

No it doesnt! U might want to raise those eyes up a bit before u start tricking people into more problems. I'd love to hear why u think its nute burn, because I didnt see one thing that looked even close to resembling nute burn.
Anyways, its calcium deficiency. I use Lucas formula and when my ph gets a few points high I start to have calcium, and potassium def. It may be time to calibrate the meter?

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what ph range do you trt to stay at when I change rez I start around 5.4