I patched the holes and tried out the Thoroseal powder. I think the coating materials all work (or not) equally well.
I used the Thoroseal on the floor area that I'm sure doesn't leak. And don't get too excited about my progress today. It's just the first coat on the white part. I may not finish the whole tank, but whatever I get done will stop a lot of leaks.
Work will get harder as I have to reach so far up the wall. I guess I'll have to tie an extension ladder to bushes on top to keep the ladder from sliding down. That's only on the steep west and south walls though. The above view is looking north. I just take it one day at a time and try not to think about the torture ahead.
On a brighter note, an AZ Powdered-Skipper seemed to enjoy the new tank coating, so I had to take a quick break to capture that. I love* that I'm starting to see butterflies again.
*Since it's Valentine's Day I had to use the word "love" at least once.