[jimwil22]

Is 1.022 a good salinity for damsels and live rock ? I heard
corals require a higher salinity? thanks, Jim

[JackedupSOB]

That should be fine you could probably even go lower. It is good to have a slightly higher salinity in a tank with corals. My LFS said that they keep their fish only tanks at about 1.018 salinity and the tanks with coral at about 1.022.

[CyberJester]

The one thing you have to remember about the LFS is that they are in it for the profit. Maintaining tanks at the lowest acceptable salinity is in there best interest because they use the least amount of salt. When mainting many tanks your salt expenses can be very high epecially when you are giving your water away with the fish that you bag.

To make a long story shorter. For reef tanks your salinity should be between 1.023 and 1.025 for fish only you should keep your salinity between 1.018 and 1.022. I always shoot for the middle of the road to allow for some deviation of the parameters without it causing tank or livestock crashes. So for the FOWLR I would try to keep it at 1.020 to allow for a small amount of swing.

[jimw369]

Originally Posted by JackedupSOB

That should be fine you could probably even go lower. It is good to have a slightly higher salinity in a tank with corals. My LFS said that they keep their fish only tanks at about 1.018 salinity and the tanks with coral at about 1.022.

Thats a real good point to remember when it comes to acclimating your fish to your tank. The SG could be way different.

[pogodzib]

Not only are corals harmed from lower salinities, inverts and other small critters (pods, stars, etc...) are also. Since LR contains many types of critters in it, I would keep the salinity more closer to reef levels, maybe a touch lower like 1.024. FO tanks can be lower since they don't have any critters in it.