I do agree with what you said. I have had so many customers that would came into the store and say I don’t know what wrong with my tank. One of the first things I would ask is when did you do your last water change. I wish that I had a dollar for every time I heard 4 or 6 weeks ago. They would reply that’s ok .
I truly do believe one of the key factors in keeping a healthy reef tank is water change.
I would like to say one thing on this topic. I have owned two pet stores in Upstate N.Y, and Reef Crystals is the only salt that we used in the store and for all of our service accounts. This a very good salt for the price.