I wanted to get input on the saltwater source for a sw tank.My hubby and I have looked online and found bottled saltwater.In the product it says you can just add fish(I know better).I was wondering if it is actually more beneficial or just as beneficial as the salt mix.The brand I am looking at says it has a salinity of 1.027 which is optimal for fish.What do you use and for a beginner would you recommend bottled saltwater?