I tried the garden hose it drooped straight down both sides of the 4" conduit. Now it was in full sunlight, but the temps were in the 60s. I think I'm going to bite the bullet and actually spend $ on some stiff plastic tubing to add on.

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.