Wow guys I really appreciate the passion.
Had a good look and no sign of mites.
I’ve went back through my phone and had a look at pictures and dates.
The first signs of rusting start on my pictures from december 9th…which is literally like 3 days after I stopped adding calmag.
Here’s a zoomed in picture from that day.
None of the pictures before that show any signs of the rusting.
It could definitely be a combination of stopping the calmag additive and also low PH.
I’m switching off AN nutes this run I think…nothing but a hassel so far.
I really appreciate everyone’s help!! Talking through these issues with others is a massive help to me and I can’t say thank you to the OG community enough.