I have tons of these white worms in my tank. Usually in the sand until feeding time then they go everywhere. They are scavengers so they prob aren't bad. The problem is there are so many. The whole substrate is covered during feeding. I'm trying worm traps now. I had a bristleworm problem in the past and bought a wrasse and it ate most of them but it won't eat the white ones. Is there a natural predator of them to help keep these worms in check?