what are the effects of high salinity on sps?

[MitchM]

Lower salinity is harder on corals than higher salinity.
Try to keep the salinity around 35 to 38 ppt.
Much variance beyond that and the coral will spend a lot of it's energy maintaining it's internal ionic balance.
If the coral spends too much energy maintaining that balance, it will die.

[Chris82]

Thanks guys. Some of my corals were not looking as good and realized my salinity was 30