So I decided to "open" (I never closed it) our pool for the season and have been checking components, cleaning, testing, etc. But I've noticed there's what appears to be "rust migration" coming from the lights. Any ideas what it is? Note the very visible trail at the bottom, but also the slight trail moving up on the top right. The pool light has more migration towards the top without the "leakage" on the bottom...
My current chem levels are as follows:
pH: 7.2 (I've been trying to lower TA from 120)
TA: 100 (hope it stays)
CH: 450 (I finally got my CYA where I wanted, so I'm reluctant to remove water, for now...)
Any feedback is appreciated. Thanks!