Been reading up on these Convolutriloba retrogemma
Recommendations to keep these guys in check are good skimmering to keep nutrients down, and wrasses often keep them in check. Also they don't like high flow areas. This is why I am not seeing many of these guys, my tank is very overskimmed with an ASM G6, and my display tank has a fairy wrasse who is probably eating any that make it from the fuge to the display. Any my display tank flow is really good.
One reason I have a fuge is to feed my display, so in this sense it is working!
They don't do any harm to a tank unless they get so out of hand that they are covering corals and blocking light to them. I can find a couple on my fuge glass, so this is not a problem for me. Tanks with higher nutrients, no wrasses, and low flow might get an epidemic of these prolific worms.
So to me, it is actually adding diversity to the tank, and providing natural food for my wrasse. As long as they stay in check and don't proliferate in my display then they are welcome to stay in my fuge and I won't try to eradicate them. They are probably a good measure of the nutrient content of my water, if their volume increases, my system is out of balance.
|