Hard science in this hobby IMO
does not mean too much.. For me its having success. Keeping fish alive long term and having good coral growth. there is no way we can match the scientific approach here. We all use different salts, water, lights, LR
, filters ect. I go with what works well for others/me and from trial and error. I have never tried to match NSW
and never will, just not going to happen.
They can tell me what natural sea water parameters are and what my salt brand parameters are but unless I stay on top of my maintenance it all means nothing.
you can not go wrong with 1.025, but people have success running lower. In this hobby there are many ways to do things and end up with the same result... A good healthy tank.