![]() is 1.025 at 25C, but where does this figure come from, and is it the best way to measure or express the amount of salt in your aquarium, is it even the correct level to be running at? Those with greater understanding may go into further detail and tell you that the S.G. ![]() Most people, if asked, would probably tell you that their reef aquarium is running at an S.G. measurement and has prompted me to write this article which tries to illustrate some potential problems when using specific gravity as a unit of measurement without a full understanding of what is actually being measured. not enough salt in their water.įurther investigation brought to light a number of anomalies and misunderstandings regarding the whole issue of S.G. The main reason that we found for this discrepancy, other than general mixing and test kit errors, was due to low specific gravity, i.e. ![]() ![]() Of course once we gave people levels to test against we received a steady stream of emails and threads from individuals who were measuring readings outside these guaranteed parameters. When we brought out the D-D H2Ocean Pro+ reef salt a few years ago, we were adamant that we wanted to print the exact levels and tolerances for the main important elements that we would expect to find in our salt on every bucket information that should be readily available to allow an informed choice for every good reef salt. ![]()
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