I am converting my tank from fresh to brackish and will soon move to full salt. I have mostly monos and one columbian shark. I am using the regular Instant Ocean salt mix. Does anyone know how many cups of salt it takes to get SG 1.025? The bag says it takes something like 1.5 pounds, but I dont have a weight scale that will measure that. I am testing the salt levels, but I still have not figured out the exact measurment.
I have been slowly adding buckets of salt water to my aquarium when I conduct water changes. My SG seems to fluctuate though. I added 10 gallons and tested my aquarium 24 hours later. The SG read 1.007. Today, another 24 hours later it read 1.0035. I had this problem a couple of weeks ago. I added salt water and after about 12 hours the SG was 1.005 and two weeks later the SG was 1.000!!!! Is this normal? I am using an expensive refractometer that I bought and it is much more accurate than a standard hydrometer. My only thought is that the cultured/cast prefabricated stone I have in my tank is absorbing the salt. Is it this, or does it take days for the salt to completely dissolve? What do you guys think?
Salt quantities-from fresh, to brackish, to marine
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