Brown spots? Too little? Too much?

im seeing brown spots on the leaves. I checked the main thread, but pictures had an x on them. They will be 4 weeks old into flower on Monday.
Some of the fan leaves are turning a yellow color.
I have been giving about 1tsp of Grow Big and Tiger bloom. I’ve been giving about 1.5-2tsp of Big Bloom, all from Fox Farm.
I give nutes 2 watering to 1 just ph’d watering.
Am I giving too much/ too little?
Should I incorporate any other nutes into it?
Suggestions, advice, comments, critique is all welcomed. Thank you RUI community.

I think it’s a calcium problem

Add some cal/mag

Chemically altered said:

Add some cal/mag

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I ordered some last night. Should be here tomorrow. It’s not showing instructions on how much to add. When you use it, how much do you use?
I usually mix the nutes in a 1 Gal jug

If you have a syringe I would probably start with 3 ml a gallon and go from there.

Fixed up said:

If you have a syringe I would probably start with 3 ml a gallon and go from there.

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Thank you

TreeFiddy350 said:

I ordered some last night. Should be here tomorrow. It’s not showing instructions on how much to add. When you use it, how much do you use?
I usually mix the nutes in a 1 Gal jug

Click to expand...

I use i teaspoon usually which is about 5 milliters per gallon see how that does for you. I’m using same nutes as you fox farms. My plants look healthy