Not sure if there's a thread just for that.. but I can list some common things.
Suction cups
Stainless steel mesh (only for freshwater tanks, will rust in brackish water)
Plastic mesh
PVC
Nylon (pantyhose, ropes, mesh)
Wood
Super glue, hot glue, silicon (all non-toxic when dry)
Glass
Not sure what else :O
Suction cups
Stainless steel mesh (only for freshwater tanks, will rust in brackish water)
Plastic mesh
PVC
Nylon (pantyhose, ropes, mesh)
Wood
Super glue, hot glue, silicon (all non-toxic when dry)
Glass
Not sure what else :O