Milky Star San - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Milky Star San

Reply
 
Thread Tools
Old 07-31-2009, 05:52 PM   #1
papamike
Recipes 
 
Jun 2009
Québec
Posts: 45


Hi, I'm pretty new with star san and I'm having an issue with the milky look of the product. I use 1/2 oz in 2.5 gallons. Everything is fine the first day, but 48 hours after, the liquid turns milky. I tried to make another batch, same thing. I don't have phpmeter to check it. Is it possible that my star san is bad after only 48 hours? I store it in plasic bottles (used for acid products before but well rinced).

Thanks for your help!
__________________
Pascal

 
Reply With Quote
Old 07-31-2009, 05:54 PM   #2
IrregularPulse
Hobby Collector
HBT_LIFETIMESUPPORTER.png
 
IrregularPulse's Avatar
Recipes 
 
Nov 2007
Posts: 50,574
Liked 3384 Times on 3241 Posts


When it turns milky it should not be used because of PH levels. You should be able to store it for a very long time though! Could be your water.
__________________
Tap Room Hobo

I should have stuck to four fingers in Vegas. :o - marubozo's mom

 
Reply With Quote
Old 07-31-2009, 06:00 PM   #3
Edcculus
Recipes 
 
Jun 2007
Greenville, SC
Posts: 4,546
Liked 48 Times on 45 Posts


Changing colors doesn't necessarily mean its bad. The only way to be sure is take the pH. Mine will turn opaque after about 48 hours too and still be good.

If you are unsure, either mix smaller batches or buy distilled water to mix with. I mix about a gallon at a time, sometimes less. 1 tsp is about the right amount for 1 gallon.


 
Reply With Quote
Old 07-31-2009, 06:00 PM   #4
papamike
Recipes 
 
Jun 2009
Québec
Posts: 45

Is it supposed to stay cristal clear all that time? Should I use distilled water to prepare it?
__________________
Pascal

 
Reply With Quote
Old 07-31-2009, 06:01 PM   #5
papamike
Recipes 
 
Jun 2009
Québec
Posts: 45

Ok thanks Edcculus. I'll try distilled water. We have very hard water here.
__________________
Pascal

 
Reply With Quote
Old 07-31-2009, 06:02 PM   #6
fartingdog
Recipes 
 
Jul 2009
Oakland, CA
Posts: 106

Star San will turn milky as the pH rises, indicated lack of effectiveness. It's your tap water that is the culprit, depending on hardness, tap pH, etc it can lose effectiveness quicker and turn cloudy - We have great water here, so mine will stay good for a couple weeks. You can sweeten the mix by adding a little more after it turns cloudy. If you want to keep it around longer, use distilled water. I've had Star-San last for over a year that way (probably could've been longer, but I spilled beer in it). You'll find more in here
http://www.homebrewtalk.com/f11/char...ewcasts-58928/
__________________
Being drunk is the best feeling in my poor world. - Drinky Crow

 
Reply With Quote
Old 07-31-2009, 06:02 PM   #7
Scut_Monkey
Recipes 
 
Jan 2009
Pittsburgh, Pennsylvania
Posts: 2,656
Liked 14 Times on 14 Posts


Starsan turns milky when it reacts with magnesium or iron in your water. Most people that want to store large quantities for a long time will make it with reverse osmosis or distilled water. This keeps it from becoming "milky" or opaque and therefore the efficacy of the product is not degraded. If you want to know EVERYTHING about starsan check out this podcast.

The solution turning opaque does not always mean that the pH is above 3.0 which is where Starsan stops working as it should. I have had starsan turn opaque and took pH readings with a meter and it was still around 2.3. They talk about this in the podcast below. The notes that are posted above are from this podcast.

http://thebrewingnetwork.com/shows/469


 
Reply With Quote
Old 07-31-2009, 06:07 PM   #8
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
 
Revvy's Avatar
Recipes 
 
Dec 2007
"Detroitish" Michigan
Posts: 40,921
Liked 3183 Times on 1883 Posts


Quote:
Originally Posted by IrregularPulse View Post
When it turns milky it should not be used because of PH levels. You should be able to store it for a very long time though! Could be your water.
WRONG WRONG WRONG...

Sorry, milky doesn't Necessarily mean that the ph level has changed, there was a thread here not too long ago that proved it. The person tested various waters and milky starsans and found out that the PH was still withing good usage range.

Sometimes the presences of certain minerals in the water chemistry render the color milky in only a few hours, but the ph level is still high enough to do it's job.

That's why it is a good idea to use RO water, and/or at least seal the container if you plan on using it the next day..and to use ph strips to test the level.

But don't assume if your starsan is cloudy and it's been under 24 hours that it is automatically bad.
__________________
Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew

 
Reply With Quote
Old 07-31-2009, 06:17 PM   #9
TipsyDragon
Recipes 
 
Mar 2009
California
Posts: 2,607
Liked 24 Times on 22 Posts


also might want to store it in glass. star san goes bad faster if left in an open container and plastic is not an oxygen brier. pick up an acid test kit from your LHBS and make sure its bad before you dump it. it should say right on the bottle what PH range the solution should be.

 
Reply With Quote
Old 07-31-2009, 06:30 PM   #10
rcrabb22
HBT_LIFETIMESUPPORTER.png
 
rcrabb22's Avatar
Recipes 
 
Jun 2008
Illinois
Posts: 714
Liked 23 Times on 16 Posts


2 tablespoons = 1 ounce. 1 tbsp would be good for 2.5 gal. Not nitpicking to be a jerk, trying to be economical. Two teaspoons would be a good measure for 1 gal as 1 teaspoon = 1/6 of an ounce and that's still a little over the recomended 1/5 of an ounce. Sorry to be such a geek.

 
Reply With Quote


Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Milky Wort Benjibbad All Grain & Partial Mash Brewing 2 08-21-2009 04:18 PM
milky looking tubing yeoldebrewer Beginners Beer Brewing Forum 16 06-19-2009 01:36 PM
milky hefe cvstrat General Beer Discussion 2 06-15-2009 12:00 AM
Beer turned milky brown? Wrathbone Bottling/Kegging 2 01-31-2009 07:10 AM
what makes a stout milky and smooth? Raffie General Beer Discussion 21 12-09-2008 08:54 PM


Forum Jump