When I built my first reef tank 6 years ago, I used live rock purchased from my LFS. I really enjoyed seeing the different fauna on the rock -- bristle worms, mini stars, fan worms, and some larger invert that was so quick I never caught a good glimpse of it except in the shadows. The mystery was alluring, but I also did not have anything so expensive in the tank that I would regret finding one of the more mischievous hitchhikers.
On my latest tank, I chose to use dry rock because I planned to select a number of more expensive corals. I did not want to risk losing these corals to hitchhikers. I enjoy watching the snails and hermits cruise around the tank, but it does not feel as alive without the mini stars and fan worms.
I am wondering if anyone has any ideas for "seeding" the live rock with good hitchhikers. The fact is, I am not willing to risk just tossing a piece of live rock tank because while I might be able to discover the larger malignant hitchhikers, I can't guarantee that I would spot animals like nudibranches and flatworms.
On my latest tank, I chose to use dry rock because I planned to select a number of more expensive corals. I did not want to risk losing these corals to hitchhikers. I enjoy watching the snails and hermits cruise around the tank, but it does not feel as alive without the mini stars and fan worms.
I am wondering if anyone has any ideas for "seeding" the live rock with good hitchhikers. The fact is, I am not willing to risk just tossing a piece of live rock tank because while I might be able to discover the larger malignant hitchhikers, I can't guarantee that I would spot animals like nudibranches and flatworms.

