salt water hydrometer - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > salt water hydrometer
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 09-25-2007, 09:00 PM   #1
houndhome1
 
houndhome1's Avatar
Recipes 
 
Aug 2007
Connecticut
Posts: 101


one of my hobbies is a large salt water reef tank. I have a hydrometer to test the salt water gravity. It is very easy to read. My question is could I use the same type for my beer. It should being testing the same thing correct


__________________
If you drink. don't drive. Hell, don't even putt!
Dean Martin

 
Reply With Quote
Old 09-25-2007, 09:07 PM   #2
Iordz
Recipes 
 
Aug 2007
Phoenix, AZ
Posts: 955
Liked 6 Times on 3 Posts


They are not really the same type of hydrometer, I guess you could use it to a certain extent but it is, most likely, inaccurate. A salt water hydrometer measures salinity, amount of salt dissolved in water. An alcohol hydrometer measures specific gravity, amount of sugar to water. Specific gravity readings depend on temperature, however salinity does not depend on temperature, if I remember correctly.



 
Reply With Quote
Old 09-25-2007, 09:17 PM   #3
Philip1993
Recipes 
 
Jul 2007
Posts: 1,633
Liked 9 Times on 9 Posts


A hydrometer measures fluid density relative to water. What creates that density (sugar, salt, etc) is irrelevant. The problem you may have is that most aquarium hydrometers don't register past about 1.035. If it is a full range hydrometer, it should work fine.

 
Reply With Quote
Old 09-25-2007, 09:37 PM   #4
LykeAFox
Recipes 
 
Aug 2007
Posts: 18

I agree with Doolittle, the hydrometer should work as long as it measures high enough SG that you will be brewing. Also, make sure to sanitize it really well... you probably don't want any fishy or salty tasting beer...

 
Reply With Quote
Old 09-25-2007, 10:14 PM   #5
david_42
 
david_42's Avatar
Recipes 
 
Oct 2005
Willamina & Oak Grove, Oregon, USA
Posts: 25,576
Liked 148 Times on 139 Posts


Should be fine for checking the final gravity (AKA precision hydrometer), since sea water runs around 1.022. I have a high range hydrometer (0.980-1.170) for OG and a -5 to 5 Brix for FG.
__________________
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk

 
Reply With Quote
Old 09-25-2007, 11:46 PM   #6
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 22,986
Liked 1588 Times on 1025 Posts


I use an aquarium hydro and have since I started brewing. The range is somewhat limited (.0090 to 1.080) but I've never brewed outside the range yet. Another interesting thing... it's calibrated to 70F and not 58F like most brewing hydros. That's actually a benefit.
__________________
Welcome to BrewHardware.com. I love you.
BIAB Large Mesh False Bottoms and SS HERMS COILS are IN!!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Old 09-26-2007, 02:06 AM   #7
malkore
 
malkore's Avatar
Recipes 
 
Jun 2007
Nebraska
Posts: 6,922
Liked 37 Times on 35 Posts


you guys talking about those cheap plastic 'swing arm' style hydrometers?

when i ran my reef tank I had one. it was wildly inaccurate. i got a hydrometer and found out just how off it was.

coulda been a lemon tho.
__________________
Malkore
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10

 
Reply With Quote
Old 09-26-2007, 02:21 AM   #8
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 22,986
Liked 1588 Times on 1025 Posts


Nope, mine is the same in form and function as the homebrew ones... floating glass tube, weighted on the bottom, skinny on top where the scale is.


__________________
Welcome to BrewHardware.com. I love you.
BIAB Large Mesh False Bottoms and SS HERMS COILS are IN!!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Water INSIDE my hydrometer prrriiide Beginners Beer Brewing Forum 4 09-28-2009 07:29 PM
Table salt for brewing water rocketman768 Recipes/Ingredients 10 08-01-2009 12:46 AM
Calibrating Hydrometer in tap water? mkorpal General Techniques 4 06-24-2009 10:31 PM
Adding salt to water and ice to cool down wort? Tankard General Techniques 14 11-05-2007 03:57 AM
salt in wort chilling water in sink? NEPABREWER General Techniques 3 04-23-2006 05:55 PM


Forum Jump