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Need help mixing saltwater

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Optimum

New member
Joined
Jan 2, 2005
Messages
2
Location
Seattle, WA
I have an emergency. I need fresh saltwater but I can't find my hydrometer. I am using kent salt and need to know how many cups of salt for five gallons of water? I thought it was 3 cups but it has been so long i can't remember, please help.
 

flugelnuss

Clownfish
Joined
Jun 22, 2004
Messages
160
Location
West Seattle
Usually it is 1/2 cup per gallon of water. so for 5 gallons, 2 1/2 cups should work to get you in the 1.023-1.024 range. add just a little more to get it up to 1.025. Where in Seattle do you live? I can give you my hydrometer. I don't use it since I got a refractometer. It's much more accurate.

Jeff
 

flugelnuss

Clownfish
Joined
Jun 22, 2004
Messages
160
Location
West Seattle
It's all about karma Ed! There were a lot of nice people that helped me along the way. I like to try and return the favor to other reefers. What comes around goes around, right?

Jeff
 

wrightme43

Well-known member
Joined
Jul 1, 2004
Messages
4,355
Location
bowling green ky
If I remember correctly it is 1/2 cup per gallon to make 1.023 saltwater, thats what it says on the package any way. I must say that I have never had it come out any where near right with out a hydrometer. Maybe get it close to the tank reading with a tds meter if you have one. just a idea. HTH Steve
 

flugelnuss

Clownfish
Joined
Jun 22, 2004
Messages
160
Location
West Seattle
It's true what you said though Steve. Hydrometers really aren't that accurate. they serve a purpose though. If i didnt have a refractometer, I hydrometer is better than nothing!
 

Optimum

New member
Joined
Jan 2, 2005
Messages
2
Location
Seattle, WA
Thanks flugelness. I just ordered a refratometer but it does not arrive for 3 days, and i desperately need saltwater now. I think 3 cup was right with my last bucket of kent salt, I will keep it a little high just to be sure.
 

flugelnuss

Clownfish
Joined
Jun 22, 2004
Messages
160
Location
West Seattle
good deal. a refractometer is really the way to go! it's probably one of the best and cheapest investments you can make for your reef tank.

Jeff
 

dnjan

alveopora
Joined
Sep 9, 2003
Messages
1,585
Location
Seattle
Hydrometers need to be corrected for temperature, while most refractometers are self-correcting. So it isn't that refractometers are more accurate, but rather they are just so much easier to use.
 

plack

Sea Otter
Joined
Jul 21, 2004
Messages
1,431
Location
Bothell ,WA
Does anyone know how to correct for temperature and at what temp they are accurate I thought they were accurate at 75º F ?
 

dnjan

alveopora
Joined
Sep 9, 2003
Messages
1,585
Location
Seattle
Hydrometers can be calibrated at different temperatures. Hopefully, it says what temperature either on the hydrometer or in the paperwork that came with the hydrometer.

Dr. Ron published a table of hydrometer corrections a few years ago. Unfortunately, a hard-drive crash wiped out the link I had stored, and I have been using a refractometer ever since my hydrometer rolled off the table onto a concrete floor. (so I haven't tried to re-locate the correction table).
 
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