Its a half cup per gallon. The one baggie will make 5 gallons. You need to measure out the second baggie since you don't need another 5 gallons what with the rock and sand.
grab one of your moms measuring cups and use that til you can get to a dollar store and get your own. its only salt so its safe.
using 1/2 cup of IO salt will get you to approximately 1.025 salinity.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.