9
MIXING SALT WATER
Clean, pure saltwater is the most important component needed for
maintaining healthy jellyfish.
When mixing salt water DO NOT USE TAP
WATER,
natural ocean water or water with added vitamins / minerals. This
will immediately void any Arrive Alive Claims!
Jellyfish do well in salinity between
30 – 33 ppt / 1.023 – 1.025 SG and a
temperature of 60-78F with ideal
temperatures between 65-74F.
What is salinity?
• Salinity is a measure of the amount of dissolved salts (ions) in the
water. Salinity is a very important water parameter to monitor. The
traditional way to express salinity is in parts per thousand (ppt) or
specific gravity (SG). The Moon Jellyfish (Aurelia aurita) we breed
in our aquaculture facility thrive at a salinity of 30 ppt (parts per
thousand). Normal seawater is about 35 ppt, while freshwater is near 0
ppt.
How do I measure salinity?
• There are many tools you can use to measure salinity, such as a
hydrometer, refractometer, or digital refractometer. A hydrometer is
included with your Jellyfish Art aquarium kit. It measures salinity in
both parts per thousand (ppt) and Specific Gravity (SG).
• IMPORTANT:
Always tap off any internal bubbles after filling your
hydrometer with salt water. Bubbles on the reading arm can give an
inaccurate salinity reading. It is a good idea to periodically test your
hydrometer with fresh water. It should read 0. It is also best to rinse
with fresh water before and after use to remove any salt buildup. Line
up the reading arm with the numbers on the outside of the hydrometer -
this is your salinity.
What type of fresh water do I use to make the salt water?
• Use Reverse-Osmosis (RO) or Distilled water
without
added vitamins
or minerals.
28 ppt
32 ppt
78°F
60°F
