Originally Posted by
AquaticNerd
Sounds like you've got a good handle on what your plan is regarding getting this tank back up and running.
If you find yourself struggling to clean off the limescale after the water/vinegar mix, I would suggest taking a look at barkeeper's friend. You can get it in a powder or liquid form. In liquid form, you can just spread it on, let it soak for 10-15 minutes. All the scale should come right off. In powder form, just mix it into a paste and then follow the same procedure as the liquid.