New to Sumps. Have a few questions.

[Fellow]

So I am upgrading/downsizing my current sumpless system to a smaller system with a sump/fuge in the next month or so. I have a few questions that I am a little embarrassed to ask .

I don’t have my new system yet, as it is still being built so I can’t provide any pics but a few details are.

Drilled glass tank corner overflow into a sump with 3 baffles, one section for fuge.

1. Water Changes

- Do I pull water from the DT or the Sump?
- Do I add top off/ new salt water to the DT or Sump
- Do I turn off all the pumps/skimmer while changing water?
- Water Line Calculation for making sure I have enough room in my sump incase the power goes out?

2. Sump sections?

- What order should they go in? (IE Media Bags -> Skimmer -> Fuge)?

I am sure I will have more when I get the system delivered.

Thanks a bunch.