What is this and how do I fix it?

So, I am noticing one of my 2 flowering females is yellowing pretty bad and showing brownish spots.. thinking it's lack of calcium. The other one is green and healthy looking... Come Wednesday I will be starting week 5 of flowering.

What is this and how do I fix this fast?

The problem plant

Check sig for my current grow. It's just getting worser and worser... Been giving it some fish emulsion but it's still yellowing :/

Looks like lockout to me.

but save us 9 pages of your grow and give the specifics here. Lights, soil, ph, ppm etc

SnaFuu said:

Looks like lockout to me.

but save us 9 pages of your grow and give the specifics here. Lights, soil, ph, ppm etc

Click to expand...

Light are HTG supply's Pl-55 fluros, one 5000k and the other 2700k
Soil is espoma potting mix.
No idea on PPM or soil's PH. Don't have a meter on hand.
Top dressed soil with 2 table spoons of sunleaves Indonesian bat guano. N-P-K of 0.5-13-0.3
Feeding with fish emulsion form home depot. N-P-K of 5-1-1
Strain is Jungle Wreck.

Yeah dude i bet that's what it is. Too much phos is locking out other nutes.

flush flush flush

I agree it is probably lockout, after you flush, it may help to give the a very mild phos foliar. This seems counterintuitive, but will help to re-establish nutrient uptake from the soil and burn off the nutrients you cant flush out.

Look like N lockoed out . give good flush . go easy on nute on way up