Welcome....
Looks like 2-3 small leaks all in the upper half of the tank on the right side.
Drained tank, letting dry, will try to identify the leaks tomorrow and fill with some more pond armor. Then fill again to ensure leaks have been stopped.
I am starting to carve the foam rocks out now and will be working on getting the other small tasks complete while I wait for the pond armor to cure and tank to dry.
I installed the hot water valve for the heating coil. So that is in place and ready for installation.
Filling took only 4-5 hours because I tapped into the main water feed for the entire house with a 3/4" T and valve right into the tank. Takes the house pressure down to zero but it fills the tank super fast.
Sorry no new pictures today.