It's amazing. It looks like a spring (except for the ice, haha) I am still amazed at how far down I can see. Where before it was less than an inch. It's as clear as tap water.
12 yr old pond, 1 ac, 15' deep. RES, YP, GS, FHM (no longer), HBG (decreasing), SMB, and HSB (only two have been seen in 5 yrs) I think that's about all I should put in my little pond. Otter attack in 2023.