Mysterious plant destroyer

Serrateeth_2002

Godzilla
Nov 3, 2002
346
1
0
36
Singapore
Somefish or something has been nipping off my cabomba plant stalks,from the looks of it,it happened at night,there are a few fish that are able to break of the stems-parrotfish,bgk,clown loaches,featherfin synodontis,black skirt tetras.I can't identify which one snaps the plants off,it is not water currents since the stalk looks like it is chewed off.
 
no snails since there are loaches,maybe i just replace the dying plants with hardier ones
 
AquariaCentral.com