#### halmus

##### Well-known member

These topics may have already been covered. I wrote a paper on it for my own benefit I wanted to put some real numbers behind the routines I have with the tank. It should be noted that I don't actually do water changes every day, but what if I did? How much of the water would be changed over a period of time?

All of these are answers I tried to answer in the following "article". That's a term I use loosely. I'm not selling anything or advocating for any particular method. I'm just trying to thoroughly understand the topic. If you see errors, feel free to let me know. I'm no scientist and this isn't official academic work. If you do disagree with the results of my "thought experiment", feel free to let me know, but please do it respectfully. We're all hobbyists with the same goal. There are no doubt issues that I have overlooked. In my paper, I did't take into account the reality that over a period of a month, nutrients are being introduced. To have a rigorous mathematical model, I would have to include "rate in" along with "rate out". That involves a level or research I don't have time or equipment to do properly.

If you appreciate math, Enjoy....