Effects of high salinity

[deepbeneath]

A few days ago during a water change my refractometer was not calibrated right and so I added too much salt during a big water change. I did not notice this until two days later when during a routine water check I noticed it was at 1.30!

The corals, rock blenny and coco worms seem fine... corraline is noticeably weaker though. Is it better to suck out water and change this quickly? Or slowly lower it?

Its a 100 gallon system BTW.

 

[KDodds]

Slowly lower it, over the course of a couple/few weeks. This actually recently happened to me when I repaired a bulkhead leak. I made up 150 gallons the night before, but it was a little difficult to be sure exactly how much water was in there since it was one of those kiddie blow up pools. I had to drain 2/3s of a 450 into this pool as well, so I needed something that would hold more than 500 gallons without falling through the floor. Pool worked great, but the salt didn't completely mix overnight. When I refilled, and checked the following day, I was at 1.030. I just pulled out 15-20 gallons per day and let the auto-top-off do the rest.

 

[dendro982]

Happened to me sometimes too, only was too busy for top-off...

I lowered salinity for 3 units at one time (within 10 min, dripping will be better), say, from 1.030 to 1.027, wait to the evening or morning, then next lowering - from 1.027 to 1.025 (or what you are using). Mombasa lion, mandarins, xenia, frogspawns - among the others - took it well. 90g tank, same in 10g with Christmas tree worms and clams.