How is it falling apart? Is it floating to other parts of the tank and if so are those pieces attaching? If you want you can rubberband a piece to a plug and see how it goes, I've found glue to not work so well....
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.