Read this whole thread & it's a painful read. Please stop doing anything, go read the stickies in all the starting sections & slow down. Water changes replenish minerals & remove unwanted things as well. I don't think anyone really enjoys doing them but they're a part of the hobby for reefers until they have an established system & have it all dialed in, for new tanks & new reefers they're mandatory. You don't have to spend a ton of money in this hobby but you do need to be patient & if you're on forums willing to listen & learn when people give you good advice like ngoodermuth above.