Hempy Question

Hey guys, I have a PPP in a 4 gallon Hempy bucket......see below from 12 days ago.....



My problem is that it doesn't look like this anymore.........see back left plant below.....



The lowers started yellowing,browning and turning brown and crispy.
Now the whole lower 3/4 of the plant is yellow and leaves are all mostly dead and crispy.

I use the Fox Farm trio on all my plants....I heard that Boneman fixed all his hempy problems with cal-mag, but im broke!!

Is there a cheaper, more accessible option to cal-mag

Thanks Guys!
-Lilmafia

Hey bro, never did a hempy but DaGambler does hempy grows, he might have some advice. Goodluck man