No dosing, 2 or 3 water changes in the past couple years, no skimmer running for the past year due to lack of ATO and that's where we are now. Green algae covering the glass, which for a while was absolutely covered in coraline but without alk/cal/mg that turned white and went away as did the corals.
All things considered the tank didn't look as bad as I'd expect from a description like this, but still real bad. Pics....
After just a little scraping of the glass, replacing a couple bulbs, 15 mins of removing old dead coral - here's where we stand tonight:
Next Steps -
First things first, ordered a replacement Apex base unit and that will be here next week. Going to get a bunch of water changes done, clean out every nook and cranny then slowly work back towards dosing and getting parameters in check before adding any coral.
Also will be moving all water out of the sump room and under the tank as we now need room for actual pantry space rather than equipment
Finally, replacing that drywall tank stand. This was the first real project I did at our house and many, many, MANY projects later this is one of the less-great looking things in the house

Funny how time and experience make you see things differently. Will be removing the "lip" of sorts which makes the footprint bigger than the tank itself and going with grey wood planks to match the house more closely. Then this fish tank room is turning into the kids' play room so they will have a nice view.
Excited to get back into it and my ears are open to any new tech in the hobby!