Salt Level For Inverts

bang guy

Moderator
A Salinity of 35ppt up to 37ppt is good for most inverts.
A Specific Gravity of 1.022 is quite low except for Gulf of Mexico and estuary animals. At 80F that's a Salinity of 32ppt.
 

sepulatian

Moderator
A specific gravity of 1.025-1.026 is ideal for most inverts. What inverts do you have in there? Bring it up slowly.
 

1journeyman

Active Member
My local fish store owner's jaw dropped to the floor when I told him I kept my reef salinity at 1.026. He couldn't believe I kept it that "high".
Needless to say I don't ask them any questions....
 

sepulatian

Moderator
Originally Posted by 1journeyman
My local fish store owner's jaw dropped to the floor when I told him I kept my reef salinity at 1.026. He couldn't believe I kept it that "high".
Needless to say I don't ask them any questions....
Yeah, my distibutor was the same way. They keep the inverts at 1.023 but they don't have them long.
 

earlybird

Active Member
Originally Posted by Bang Guy
A Salinity of 35ppt up to 37ppt is good for most inverts.
A Specific Gravity of 1.022 is quite low except for Gulf of Mexico and estuary animals. At 80F that's a Salinity of 32ppt.
What does "ppt" mean (parts per...)? What's the formula to determine "ppt?"
 

bang guy

Moderator
ppt - Parts Per Thousand.
A refractometer or a Conductivity Meter (TDS Meter) will measure Salinity directly.
Hydrometers like the glass floater or the swing-arm measure Specific Gravity. To determine the Salinity from a hydrometer you also need to know the temperature of the water and a chart.
 
Where might I see the chart you are speaking of? I do use a swing-arm hydrometer and it is saying 1.026 and I had it verified with my LFS. Temp is 81.5 in the day and 80.5 at night.
 
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