Do they make a glue that bonds PVC underwater? ....well i lost 1/2 my pond today..with brutal temps last few weeks the ice froze I'n my outflow pipe.. Ice rose and pulled pipe and snapped it at the 90 elbow.. Sad sight.. So much wrk lost.. The water level has dropped 8 ft , all ice kinda slid I'n and pulled my shoreline away.. Rock/ bank/ grass.. Pond is going to be about 10ft deep even after pipe break.. So i turned off shallow defuser and turn on deep defuser til spring i guess. I'll see what mess i have this spring.. Next year i will have a defuser near outflow pipe . My pond is 1/2 acre 19 ft deep with a spring feeding at 300 gallons a hour.. .... Btw... I have a secondary pond ( down river) that saved any fish that might have took the journey.. Any recommendations would be great..