Maybe a silly question, but do you have to replace the pipe every year? Maybe not in a wind protected small pond but if the ice gets to moving during spring thaw with the wind won't it snap/bend it over?
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).