Please help me

[Proteus]

I have in one corner of my tank a killer. There are long sweeper that are out during the day. They are about 8" long on seem to come from the rock. They have formed a Matt or web. But also free flows. So far it has claimed 2 stags and a birdnest in a Matter of a day.

Short of ripping my Ripped apart to boil it is there any solution or even some experience with such