I recently bought my first sw
fish. I had been keeping my sg
around 1.023, as I thought this was in the acceptable range. When I brought my fish home, I checked the water in the bag. The sg
was 1.017, well below the target range on my hydrometer. When I bought my second fish from a different store, their water tested 1.019. My dad purchased a fish that was still in the bag from the wholesaler and the sg
was 1.020 on his hydrometer. Is it general practice to keep sg
this low to save money on salt? Is there some other reason for this? Should I lower my salinity to avoid stressing new arrivals?