Hello everyone. I am new to saltwater, and need some help with dosing in my tank. I currently have an evo 13.5. I have had some zoas and acros and recently added a hammer and torch. Both only lasted about a week. I checked all parameters and they are ok. When I checked my calcium and magnesium they were very low. My question is should I start looking at dosing? Water changes alone aren’t doing it anymore. Thank you in advance for your help