I have a toadstool leather and it sometimes shivers up for a couple days at time, sometimes up to two weeks. As long as the leather is not turning black (rotting) I think it should be okay. As far as the frogspawn, I attached my frogspawn with HoldFast Epoxy by Marineland. I just knead a ball of putty and attached the frogspawn directly to a piece of LR.