2 issues- Algae and Dying torch

[Reef Pilot]

Does seem kind of odd that all was going good and then suddenly everything dying. Was this after a water change? New salt? New carbon? There have instances where bad batches have poisoned the water.

No bugs or nudis?

A little algae on glass is normal, and needs to be cleaned often. Doesn't sound like you have a nutrient or husbandry problem.

I know there are other local reefers in Abby. Maybe get someone to come over and have a look, and might discover something.