So I've been using Reef Crystals ever since I got in to the hobby a few years ago and until recently I've been happy; but lately it's been leaving a brown-chalky residue inside of my mixing container. I've heard good things about Tropic Marin Pro Salt and I just wanted to get some more opinions on it. I know it's pricey, but I strongly believe that clean water and clean salt are a MUST so I don't mind spending the extra cash. What are your thoughts?
