hi Im new to this forum I have kept triggerfish, lionfish, an eel, and puffers. I have tried to keep a clown tang or lined surgeonfish. He died after I had him for about a week. I been told they are extremely susptible to ich and lateral line disease what is the best way to prevent this with these fish? I've heard about UV sterilizers, but the ones I have seen are expensive, are there any other methods that are good?