lol Nimbliez...you here to advertize for rollitup or something?

Hydrocannabis, I love ya kiddo but MAN you have been here long enough, and with SO MANY problems, that I'm just shaking my head that you are still running with unknown soil and non-cannabis plant food at unknown pH! I mean, you filled out the form but with like no useful info other than that you are using hosta food. Hostas are an outdoor ornamental shade plant that may prefer different conditions and fertilizer ratios than cannabis. Why haven't you just finally gone out and got yourself a bottle of pure blend by now, which is so freaking hard to screw up that you have to practically TRY to kill your plants with it?
When you say for your exhaust that you have "a fan" that could be anything from a battery operated mini fan in the corner to a giant 400cfm blower set up as exhaust!
You say you are adding your ferts at 1/4th but do not give any unit of meadurement- 1/4 gram? 1/4 teaspoon? 1/4 ton? Come on! We need DETAILS!

I'll say again:
REad the flushing/chemistry sticky linked in my siggy.
Follow the instructions until your runoff pH is 6.7.
Use cannabis specific fertilizer.
Use a correctly configured room exhaust.

Your plant is suffering metals lockout due to low pH and possibly overwatering.