Fish's new tank project

[Fish]

Concerning the rates of evaporation being slightly different every day, more common is the rate changing slightly between day and night. The level drops slightly during the days and rises more during the night hours. The minor changes in humidity temp etc are not enough to significantly effect the water level as a day to day average. Any significant changes, especially in a temperature controlled dwelling like a home of office, will occur from season to season - not day to day. And the tank is never left long enough without a water change to make a difference. I used one of these pumps to dose a 2gal nano for a couple years and it would take at least two weeks for the water level to creep less than one centimeter either up or down. Because I was usually doing water changes more often than that, it was never anything I had to address.
I have settled on the rate of 0.32ml 8x's every minute and for three days it has been holding the water level in my sump at the exact water line mark I drew on my sump with a sharpie - just under the line in the evening, and just over the line in the morning. If it looks like there is a net gain or increase in the level at the end of the week, I will increase or decrease the dosing rate by one stroke per minute.
I wouldn't trust a float switch to do my topoff. Not saying there's anything wrong with it - I just think there is too much risk of it sticking on or off for my personal preferance. I've had the float in my toilette fail more than a few times and that has a more bouyant float, is immersed in pure cold fesh water with less mineral content, and never has algae buildup or snails, etc.

Cheers,

- Chad

Edit: photo updates on page 21