Hi. I used to keep my reed tank at a salinity concentration of 1.022, and I recently changed from instant ocean salt to instant ocean reef crystals because I was trying to set up a reef tank, and I thought I had followed the recommended mix of 1/2 cup per gallon for a concentration of 1.025, but I might have miscalculated because when I checked the concentration it was 1.027, and I quickly adjusted due to the fact that I have 2 brittle stars and a pincushion urchin in the tank. I’ve also seen that some like the ideal concentration at 1.023. I’m wondering if anyone has experimented with this concentration, if it’s good, or if I should keep my tank at 1.025. I would also like to know if anyone knows how much salt to add per gallon, of water for a 1.023 concentration. Thanks