When
mixing artificial salt water using
RO/DI-purified water and a quality sea salt mix, all you have to do is make sure the basic parameters—specific gravity,
temperature,
pH, etc.—are in the correct ranges before using it in your aquarium.
Natural sea water, on the other hand, tends to require a lot more pretreatment before it’s safe to use in aquariums because of the dissolved organics and planktonic life it often contains. This typically involves filtering the water through a
micron filter sock at the time of collection to eliminate as much debris and plankton as possible. Then, processing of the water usually continues once the hobbyist gets it home in order to render it safe for aquarium use. This might involve one or more of the following steps:
- Storing the water in a dark container for at least a few weeks to allow any remaining plankton to die off and settle to the bottom, and to allow bacteria time to consume any dissolved organics
- Running the water through an ultraviolet sterilizer to kill off any parasites or disease-causing microorganisms
- Treating the water with chlorine to kill off any life form, followed by the use of a dechlorinator
Of course, after that, it’s still necessary to test and possibly adjust all the
critical water parameters to make sure they match the parameters in your aquarium.