slushfund wrote:

No mold in the bathroom since fan is used during and after showers
for a long time to evacuate most if not all the excess moisture. Simply due
to difference in temp between air and water in the tank. Thought of
installing a mixing valve but most people I've talked to that have had them
say that they plug up after a while and have to be replaced. It seems the
insulation of the tank lasted at least 10-12 years for short money too.
Just can't find the old type of insulation I had in there.
Think I should just scrape the old adhesive off from the inside of
the tank?

I can tell you that almost all of the styrofoam insulation that failed
was on the bottom of the tank, The sides are still intact. I just looked
in there and there are still little styrofoam balls floating on the
surface of the water. I put this styrofoam kit in the tank more than 10
years ago, so the life span of both is about the same. I don't have much
glue left on the bottom of the tank other than a few 1" round spots
where the styrofoam is gone, since I had just tacked it in there.
Perhaps if I had put a lot of glue in there, the bottom wouldn't have
broken up. I don't know if you can scrape it out, but I suppose it can
be done. I'm not going to bother.