you probably got it, just keep an eye out though. Those suckers can get huge, recently I had to help a friend get all of the rock out of his 700gal as it blew a seam near the bottom and put all the rock into a brute with water and a powerhead. Next morning, GIANT bobbit worm at the top and I couldn't catch it. Fast forward a couple days, everything on and in the rocks die and I find an 8 foot long 1in thick, let me repeat that, 8 foot long 1in thick bobbit work in the bottom of the tub. Moral of the story, keep your eyes open and make sure you got it.