I just switched from instant ocean to fritz and am wondering if anyone has used fritz, and if the standard .5 cup per gallon makes 1.025? There aren't mixing instructions on the box, their website, or anywhere I could find on google.
I wouldn't rely on measurements like that when mixing salt for your reef. They will generally get you in the ballpark...but I'd pick up a refractometer or at least a hydrometer to test the salinity if you don't have one already.
That being said...I've been told that their salt is essentially the same as the Microbe-lift Reef Salt. Haven't found this documented anywhere to confirm...but I do know that the standard measurement you mentioned does apply to the Microbe-lift salt...so it should get you close.
I have both a hydrometer and refractometer, I test with both before using the water to make sure one is not way off. Do most measure salt by weight when mixing? I'm new to the hobby, and the only guideline I saw for salt measurement was on the instant ocean bag saying .5 cup per gallon.
I can't remember the exact measurements I use...but I usually mix my salt by weight. I measure the volume of water that I'm mixing (I've drawn lines on my mixing drums to estimate volume), and then the first time I mix a new type of salt I slowly add salt until I get my target salinity...and I measure the weight of the salt as I'm adding it.
Basically...you're going to have to go slow the first time, or at least add a conservative amount until you can confirm the weight (or volume if you are using measuring cups) of the salt that you're adding to the RO/DI water to reach the target salinity.
Ok, I was hoping I could bypass the little by little addition of salt and many measurement process, but it seems inevitable when switching to a new salt. One can only hope I guess. Out of curiosity how many grams of salt do you use per gallon?