Hi everyone, this is my first post and I am going to be setting up a tank but for a while I am only going to have fish in it, I understand that for corals you need calcium, alkalinity, nitrate, phosphates. But if I only want to keep fish for the time being do I need any of them ? I have coral pro salt but I didn’t know if I would need to test for all and calc and stuff like that ? Hop this makes sense