I'm using a vacuum pump used for suctioning. My dad used it when he came out of the hospital some years ago.(I don't throw out anything that I think I can use) I'm not sure of the make but it puts out some pressure and if hospitals use it it's going to be durable, and it was cheap.
I didn't have the isopropyl so I used the denatured alcohol, about 25cc injected into the air line and reconnected. Turned on the air and began to see some bubbles under the ice.
Waited about 3 minutes and you could hear the air breaking the ice. Ten minutes later the water was rolling as it was before ice covered the pond. The air pressure went from 38 psi to 20 psi so I know the line was cleared.
Hope it stays this way the rest of the winter, but we have some more cold weather coming in.
