Originally Posted By: fish n chips
Could it also have something to do with it not raining, no matter what time of year?

My thought is that when it rains heavy enough to be used, could that water be mixing with that bottom layer and making it less noticeably smelly.


It might need a LOT of rain to do that. I had enough rain to raise my pond (increase it's depth) by about 25% (pond rose about 36"). The thermocline went from 8' down to 14' feet, and there still was a couple of feet of water under that thermocline to the bottom of the pond.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).