well i will have to keep you all posted. i can wait really im going tomorrow night to get it and this is the first time i will have seen it face to face.
White or apple vinegar also works on calcium deposits. I was able to get most off my one tank with that and scraping with an old gift card.
First picture is your sump, second pic that is your pump on the right, a protein skimmer in center (very few people run those freshwater but have seen it), and those dials on the left I used to run as a cheap way to turn on and off the lights at set times (or whatever you feel like only running at certain times).
Third picture looks like an older magnum 350 canister filter (should have a top).
Fourth picture, the rock is base rock as it is far from live now. You can sell that and the skimmer since you are going freshwater.
Also, bottom picture that is the tube that leads into your sump. Not sure what the blue thing is bc hard to tell in picture.
Also judging by the colored lines coming off a different canister in top right of fourth picture he has an RO [reverse osmosis] unit (filters water, greatly removes tds/total dissolved solids, and other trace elements depending on how many stages). Not sure if he is including that.