Pond Boss Forums INTRO Questions & Observations fish hatching time???

I can't remember the exact number, but LMB and sunfish eggs should hatch within 7-10 days after being fertilized (length of time varies with the water temperature).

I would not worry about your loss of 3"-4" in two weeks dropping below nest sites in 2'-3' (or more, for LMB) of water during the hatching interval. IF you have prepared, fixed location nesting sites (e.g. pea gravel in tires, or the like) and those are the ONLY suitable nest sites in the pond, I could see where the water loss could overrun them. But otherwise I think nesting male LMB & BG would start at their preferred depths below the current water level, giving enough headroom for the eggs during the hatching interval.