hey all i have had my 14 gal bio cube up and running for about a month now and a new friend has decided to show him self its about a 5 or 6in bristle worm. I currently have a hand full of snails a coulple hermits a coulple mushrooms and a clown in there and am wondering if i should be worried about the well being of the rest of my tank. i have done some reading on it and althought i know that its a benefical scavanger i know it can be harmful if it gets to big. whats too big? and what else should i look out for?