You are going to get lots of advice. My advice is to get a good alkalinity test kit like a Hanna checker. Then do a 10% water change once a week with your favorite salt mix. Check your tank’s alkalinity at that time just before the water change. If your alkalinity is between 7 and 11 dKH, don’t add any chemicals to your tank. This should work for a long time. I also highly recommend quarantine of all animals before going in your main tank. Good luck!Ok thanks. Just checking I'm new to this. I just started in August so I'm still learning.