Question on lowering salinity

[KJAhp098]

My salt is at 29.5. How long should I take to drop it to 26?

 

[bobbyboussy]

put fresh water in your tank

 

[KJAhp098]

put fresh water in your tank

Thanks, but sounds/looks like you're racing to 50.

 

[tntneon]

-add fresh water slowly , and only adding max 5 % tank volume of fresh water a day ;
else S.G. will drop to quick , and you will stress corals even more


greetingzz tntneon

 

[dots]

Correct, it's not only the initial stress caused by the displacement of the up swing, but the down swing too.

Ultimatly, it does depend on how much of a correction is needed and how long it has been that way or working towards it......if you just mixed some new water today or accidently added it in the last few hours, correcting it imediatly shouldn't have any drastic effects. However, if it was a creep or a few days/weeks it would need to be corrected in about the same time frame if the livestock seems to have tolerated the initial rate of change.

We are assuming your data is based upon reliable measurements, should I ask how they were obtained?

Here is an article on SG, which if using a refracometer, most tend to shoot for 35ppt.....your report of sg units made me wonder is the only reason I bring it up.

http://www.reefcentral.com/forums/showthread.php?t=1379607

 

[KJAhp098]

Thanks, guys.

I've done 1 waterchange every 2 weeks and it started about a 3 weeks ago.

I use a refractometer to measure the SG.

I took a water sample to 2 fish stores yesterday and both tested at 29. Then I got home and recalibrated my refractometer, but it was already at 35 ppt. After I checked to make sure it was calibrated, I tested my water's salinity and it was at 35 ppt.

Could the calibration fluid be off?

 

[dots]

If you have purchased the calibration fluid, and have not contaminated it, it should be fine.

Sounds like your adding too much salt with your initial mixing.