Thanks for the response.
For clarification, the aeration system turned the well water for almost a month before fish were added and that was 6 months ago. Since, any compensation for evaporation has been from rain water and water shed. I've only added well water again once, it wasn't much, and it wasn't recently.
You not finding any dead fish in 6 years is an interesting data point for me though... thank you. I'm sure I'll get this dialed in over time. I just wanted some experienced thoughts on what I was seeing.
Cheers!
/c
