Hello! I’m not new to keeping fish (freshwater) but getting back into saltwater aquariums! I just picked up a Fluval Flex 15 and will be upgrading some of the equipment and getting it wet over the next couple of months. So exciting! I’ve been lurking for a while here and I’m learning so much from everyone! Anyway, I’ll start a build thread once I get this thing up and running. What’s once piece of advice that you think will help me in this journey?