There's a very worrying one in the shower which no amount of sealant has cured,
so the whole thing is going to have to be ripped out,
and another one in the pond liner which seems to have got worse since the thaw
so that will have to be drained and re-lined if it is to have any chance of turning into
the model habitat illustrated in this early Child Education poster.
At present both pond and shower spectacularly fail the U or B test.