help with lowering salinity

[ScienceAchieved]

Ive just upgraded to a refractometer from a swing arm. I had thought I had been keeping the sg at 1.024, but its actually been 1.028. Should I change out x gallons mixed to 1.024, or just use fresh ro/di? I have a 55 gallon tank. Id really appreciate advice. Thanks.

 

[fishgate]

How many gallons is the tank? I'd do a little day like remove a gallon of water and replace with straight RO/DI water (no salt) on my 125 gallon tank.

 

[Pluedke1]

I agree with fish gate, that is the method I use as well. Good luck

 

[W1ngz]

There's a calculator on a site called SaltyZoo that will work out the number, volume and salinity of water changes to make. you said 55 gallons, didn't mention a sump, making a guess for displacement of rock and stuff inside the tank, I guessed about 40 gallons of actual water.

I set the starting salinity at 1.028, and the target at 1.025. This will put you right in the middle of the "usual" 1.024-1.026 range.

Basically it calls for 4 changes of about 1.1 gallons each, of plain RODI.

This plan calls for 4 water changes
[Number] [Tank Sal. (BEFORE)] [Gallons] [Salinity] [Tank Sal. (AFTER)]
[1] [1.028 sg / 37.1 ppt] [1.1] [1 sg / 0 ppt] [1.027 sg / 36.1 ppt]
[2] [1.027 sg / 36.1 ppt] [1.1] [1 sg / 0 ppt] [1.026 sg / 35.1 ppt]
[3] [1.026 sg / 35.1 ppt] [1.1] [1 sg / 0 ppt] [1.026 sg / 34.1 ppt]
[4] [1.026 sg / 34.1 ppt] [1.1] [1 sg / 0 ppt] [1.025 sg / 33.2 ppt]

 

[droog]

I would just pull out a cup of tank water a day. Let the replacement water come from your freshwater and salinity will drop gradually.

Or if you have a skimmer, set it to skim wet. The skimmate you collect will be saltwater that is topped up with fresh.

-droog