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SALINITY
Frequently Asked
Questions |
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Back to FAQ Index Page
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What is the recommended specific
gravity / salinity for a saltwater fish or reef tank?
Reef tanks should be kept between 1.023
and 1.027 to keep coral and inverts happy.
However, if you have a fish only
saltwater system (with no invertebrates) you may consider keeping the
salinity slightly lower - down to 1.018 to help prevent
outbreaks of ich. |
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How do you keep the
correct salinity (salt level / specific gravity)?
The most important part about keeping your salinity at the right
level is having the right equipment to measure it.
Salinity can be measured best with a
refractometer which can be purchased at NorthSide Aquatics.
Refractometers are moderately expensive, so many people might
opt for a simple hydrometer. NorthSide has several different types available.
The key to keeping salinity stable is to remember that salt
does not evaporate. When freshwater evaporates from a
saltwater aquarium, the ratio of salt increases because there is
less water left to dilute it. When
you add freshwater to your saltwater aquarium to make up for
evaporation, the salt level
decreases because there is more water to dilute the salt. This means only add freshwater to replace evaporated
water.
Likewise, if you remove water manually from your aquarium with a
hose or a cup when doing a water change or acclimating fish, the
salt goes with the water. Since you are removing both salt
and water, you should add back saltwater to replace the water
you took out. Remember that salt should be mixed with
RO/DI water before it is added to the aquarium.
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I'm a busy person. Isn't
there an easier way to deal with mixing saltwater?
As a matter of fact, there is! NorthSide Aquatics sells
pre-mixed saltwater that is mixed to reef specifications, or
1.023. You may bring your own container or purchase one at
our store. Containers should be clean and not used for any
other purpose other than carrying water intended for your
aquarium.
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