Spike Brewing Giveaway - New v3 Kettle

Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Low OG, how and when to raise
Thread Tools
Old 06-10-2008, 05:02 PM   #1
Feedback Score: 0 reviews
Join Date: May 2008
Location: Dayton, Ohio
Posts: 243
Liked 3 Times on 2 Posts

Default Low OG, how and when to raise

Yesterday I began work on only my second brew - a DFH 90 min all grain. The recipe called for an estimated OG of 1.075-1.090. I struggled a little with the mash temperature and it took me about Ĺ hour to get the temperature right. Once I did I let it sit for about 40 min after reaching that temp (probably not long enough?). I sparged and got my boil kettle to 6.5 gallons (thatís all it would hold) and everything else went good, but I boiled off a lot of wort over a 105 min boil and I ended up with just over four gallons 4 gallons. I will note that it took a long time to achieve a boil.

Before transferring to the fermenter I took a hydrometer reading and got 1.06. I then transferred to the primary, added almost 1 gallon of water to get to 5 gallons and pitched the yeast. Shook it all up nicely and took another hydromerter reading and this one came in woefully low at 1.04. This morning I looked at the fermenter and it looked like the contents were boiling there was so much activity. The airlock didnít pop off, but krausen did escape and splattered the wall. That seems to have receded a bit so no big time blow off hose is necessary at this point.

That all said, it looks like I messed up and did not get good extraction. I want to raise the gravity and was wondering how I would do it and at what point in the process I should do it. As always, thanks in advance for all the help.

GLWIII is offline
Reply With Quote
Old 06-10-2008, 05:22 PM   #2
Feedback Score: 0 reviews
Join Date: May 2008
Location: Jinan, China
Posts: 293
Liked 2 Times on 2 Posts


I got a frustratingly low OG reading last batch, but realized that I simply hadn't mixed the added water and the wort well enough. Maybe this is the cause? If you mixed it well, then I have no idea :x

bottleopener is offline
Reply With Quote
Old 06-10-2008, 05:26 PM   #3
Ale's What Cures You!
Feedback Score: 0 reviews
Yooper's Avatar
Join Date: Jun 2006
Location: UP of Michigan, Winter Texan
Posts: 67,721
Liked 6990 Times on 4958 Posts
Likes Given: 1975


It's too late now, but I would have boiled up some DME in that 1 gallon you topped up with. That would have keep you from diluting the wort. So, keep that in mind for next time- I always have some DME on hand for starters and just in case I miss my OG.

In this case, you could boil up some DME in some water, cool it and add. If you have brewing software, it could help you figure the exact amount, but 2 pounds DME in a little water should add about 16 points to your OG.
Broken Leg Brewery
Giving beer a leg to stand on since 2006

Follow me on facebook: https://www.facebook.com/lorena.t.evans
But I'm pretty boring so don't expect much!
Yooper is offline
VachonBrewCo Likes This 
Reply With Quote
Old 06-10-2008, 05:52 PM   #4
Vendor and Brewer
Vendor Ads 
Feedback Score: 4 reviews
Bobby_M's Avatar
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,817
Liked 1484 Times on 966 Posts
Likes Given: 35


4 gallons for 1.060 = 240 points... dilute that to 5 gallons and you get 240/5 = 1.048.

You could have sparged about a gallon more and held it in a bucket until your main wort evaporated enough to fit it in. That way you wouldn't be topping with water. It also sounds like you might want to look at your general AG technique to increase your efficiency.
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
ABV, and how to raise it foxual Beginners Beer Brewing Forum 11 07-31-2009 02:42 PM
I wish to raise the ABV but need some help ipbr21054 Beginners Beer Brewing Forum 12 04-27-2008 08:43 PM

Forum Jump