Hmm... My original question was about the rate at which I should re-fill the water, but now I'm questioning how many gallons I should change and how often.
Right now, I have a 10g s/w fowlr
nano that I've had setup for a little over 1 year and a 15g f/w that's been up for many years. I do a 1g w/c on the 10g nano once every two weeks and about 3g once a week on the 15g f/w.
Since this 72g s/w is going to be a new setup, approximately how often and how many gallons should I change? And down the road when the tank matures, what would be a good approximate gallon change and interval? I understand that it depends on a variety of circumstances such as stocking, feeding habits, equipment, etc, but I just wanted to get a good general idea.