Tropical Fish Keeping - Aquarium fish care and resources

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molliefan09 02-02-2010 01:22 PM

increasing specific gravity
right now my SG is 1.021 and the salinity is between 28 and 30. i was told the SG needs to be between 1.024 and 1.025. how do i go about raising the SG??

Austin 02-02-2010 04:41 PM

I'm no expert at this but wouldn't you just add salt? Or, fill up some of the evaporated water with saltwater instead of freshwater until you reach the salinity you want.

...Specific Gravity is salinity right...? Or have I been under the wrong impression for the year I had my saltwater tank....><

gus1911 02-02-2010 05:07 PM

I believe you're working too hard at this. Specific gravity is simply the ratio of the density of any liquid compared to the density of distilled water (which has a specific gravity of 1). Any liquid can be compared to water in terms of specific gravity, but since we're only addressing sea water here, we can simply call it specific gravity and forget the "salinity" part of this. They would both mean the same thing.

Simply remove some tank water and add a concentrated mixture of salt water to the tank - SLOWLY - over a period of several hours, or even a day or so until your SG reaches 1.024 (or to wherever you want it).

molliefan09 02-02-2010 05:22 PM

ok, thank you

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