I was doing some cleaning and noticed these large bristleworms in my overflow. There at least 6". There wa about 7-10 of them, not all around that size. I removed them.
There are still 3-5 in the overflow.. Debating on whether or not to remove them. I had a huge problem with bristleworms. I removed alot of rock because of the insane amount i had in my tank. They burrow inside the rock and reproduce like wow.