How many hours a day do you spend on your tank(s)?
What is your average evaporation rate of your tank(s)?
Do you use Carbon? How much and for how long?Low flow or high flow/pressure?
What percent water changes do you do in a month?
Do you add anything with your topoff water?
What is your flowrate through you fuge?
How does you fuge drain into your display? Gravity? OR pump?
Do you have mangroves in your fuge? how many?
How many people do you allow to do anything with your tank?ie...water topoff, feeding livestock...etc

I could go on and on with this, let me know if you want more.