Are Anthropods eat all my grape colurpa in my Fuge?

[b_james]

I have noticed a drastic reduction of grape colurpa in my fuge and suspect the anthropods (or what ever there called) are consuming it. The colurpa doesnt appear to be dying as there is absolutly no signs of white decomposing matter. What is left from what used to be long vines are now fragments floating round. The fragments at the bottom of the fuge are covered with these pods. Although I run the fuge light 24/7, I may still have to go out and purchase some more algae - Unless I dont have enough nutrients i the system to sustain more algae.

Any thoughts?