First and foremost..... Welcome! You should quarantine first. Especially if they are going next to an already establish setup. I learned this the hard way. Had an episode of mites from a newly acquired noodle a while back. Since then I have a dedicated quarantine tank in a closet opposite end of the house. I do not want to go through that again. And its not just mites, but you want to guard against anything that could cause illnesses from the new critter.