Who is eating my plants?

Who is eating my plants? NM

90 gallon tank

4 balas
8 green barbs/tiger barbs (5 green 3 reg)
5 penguin tetras
5 BA tetras
7 neons
3 gourami (2 opaline 1 gold)
1 rainbow shark
1 stripped raphael
7 clown loaches

I suspect either the balas, barbs or the rapheal. they only seem to eat plants like wysteria or other "bushy" plants. but I have yet to catch anyone in the act.

NM, I read AsahiToro's thread and have come to the conclusion that it's probably my clowns. It makes sense, since it is usually towards the bottom of the plants. I'll just live with it.

Thanks anyway.