Rough guideline- cups of IO salt per gal for 1.026 sg @ 79F

[esmithiii]

I am filling up my 180g tank (it will probably take 3 days) and want to know how many cups per gallon it takes to get a specific gravity of 1.0265 at 79F?

Once it gets near full I can adjust if the SG is too high or too low.

It is not on the bucket as it is on some other brands. Also a measuring cup is not provided.

Thanks,

Ernie

 

[Robb]

I've got a bucket of Reef Crystals in front of me. I usually run at 1.026 it says 1 cup for2 gallons. I usually use a coffee cup that came with my dishware. (they are about 8 oz)

HTH,
Robb

 

[Anonymous]

IO has the same ratio.

 

[esmithiii]

Thanks guys.

Ernie

 

[TrevorRobertson]

wow that is just one of those questions that you have always wondered but never asked. Thanks.

 

[sstephen]

As noted above, Instant Ocean recommends 1/2 cup per gallon; but I don't think that's for the salinity you originally requested. I've found that it actually gives you a much lower salinity in the 1.022 - 1.023 range at that amount. I'm currently experimenting with finding a more exact amount, using a digital scale, to find out the necessary grams of salt needed for 1.025. I think the lower salinity recommended on the box is targeted for mainly fish only tanks as invertebrates are not very tolerant of such low salinity.

 

[Mogo]

I'm with Trevor.
I remember looking for this info when I was setting up my tank. I still haven't got it really. Except I marked off an old calcium container that I fill with salt to the line and plop in my pails based on many previous water makeups. Then diddle with dilution or additon from there. When I asked my LFS for this info they thought I was nuts (possible). Nowhere on my Kent bucket does it give anything like " add one teaspoon per gallon and go from there until desired salinity is reached under room temp conditions" Of course there are many variables here. But a starting point for a newbie, or anyone else would have been nice.

 

[Anonymous]

crap... lost a big edit

Several ways to do this. All of them involve conversion charts...

Convert 1.026 to ppt. Its about 35. Now,
35 parts of salt per 1000 parts water.

Or take a gallon of water and add salt until you have a ratio of water mass to volume equal to 1.026 g/cm^3

 

[esmithiii]

If I could get out my powder scale (we still haven't gotten fully unpacked yet) I could weigh a cup and go from there. I only need to get in the ballpark.

Thanks,

Ernie

 

[Mogo]

I'm starting to like my little home made salt dispenser with a black marker line on it.