I didn't begin adding calmag supplement until very late in the piece, by which stage many of the leaves on the AFA had degenerated significantly and naturally defoliated. This was a mistake. The stupid levels of calmag love/hate meant that I was slow to identify it as the issue with the leaves until the AFA was a bit far gone. Once I started implementing, the premature fade/yellowing was arrested until the final part of this grow. RIP.