i saw a tube worm when i was scrubbing my LR off before it started curing, it was dead, but havent seen any more of them since i put the rock into its curing tank. i know that when there is one, there could be a bunch more. will they die if my spike is high enough? why are they bad anyways? i mean they're ugly and frankly i dont want anything in my tank that i didnt invite, but what are their effects on the tank?