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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > First all grain brew, OG only 1.038
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Old 05-17-2008, 02:26 PM   #1
agforest
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Default First all grain brew, OG only 1.038

Well, I made my first all grain brew last night. I think that I made some mistakes though......

I made a wheat beer. Here is my recipe:

4.25 lbs Belgian Pilsner Malt
5.0 lbs white wheat
1 lb flaked oats
8 oz rice hulls
Cascade 0.25 oz, pellet, 60 minutes
U.S. Golding 0.25 oz, pellet, 60 minutes
U.K. Northdown 0.25 oz, pellet, 5 minutes
Saaz 0.25 oz, pellet, 5 minutes

0.4 oz Coriander seeds @ 15 min
1/2 oz bitter orange peel and California navel orange@ 15 min
WLP 400
Used 3.5 gallons of strike water and 4.5 gallons of sparge water
I mashed at 152 degrees (according to my thermometer) for 60 minutes. I will get a digital after today, my thermometer is a piece o sh**Te.
Then sparged with 170 degree water. I basically just drained my wort into my brew pot then added half my sparge water and stirred and drained and repeated.

after boiling for 60 minutes, I cooled with a wort chiller to 75 degrees and pitched yeast.
I took a sample and my OG is only 1.038?!?!?!!?
CHecked OG at 60 degrees.

My mash pH was 5.6, should I adjust this?

It is starting to show signs of fermentation this morning.

Should I add some DME? If so, should I just sprinkle some into my glass carboy or add a little to some water and heat it up?

I am worried about aeration. Should I sterilize an airstone and aerate to make sure that the yeast have enough O2 to really get started?

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Old 05-17-2008, 02:34 PM   #2
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oh yeah, how do I calculate mash efficiency?

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Old 05-17-2008, 03:41 PM   #3
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There are free calcuators here...

http://www.tastybrew.com/calculators/

I wouldn't sweat the low OG, your beer is fermenting, it will be good. I use hotter water for batch spargeing, 185 or so...

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Old 05-17-2008, 05:51 PM   #4
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That is a good first brewed beer.

Now after the dust settles brew another batch and then you won't have to wait when you drink the last beer from the first batch. You can leave the beer in the primary 4 weeks if you don't have bottles or kegs available and it will be fine. Aging = good beer.

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Old 05-18-2008, 04:49 AM   #5
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Aw man, I just finished brewing my second all grain brew a few minutes ago.... I now have a big bowl of beans and corn bread in front of me to eat!!!! llol I love beans and cornbread!! I brewed Bier muncher's Centennial Blonde tonight. I was very methodical in my mashing and I still didn't get good efficiency. I added a pound of LDME towards the end of the boil when I realized that I would not get good efficiency. My starting gravity is 1.47. I think that Austin Home Brew might not crush their grain that well. I will have to invest in a grain crusher. I have been drinking homemade beers all night.....partial mash. 2 black dog clones, 3 hefeweizens and 3 belgian wits. now I need food!!! and sleep...lol

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Old 05-18-2008, 05:00 AM   #6
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What is your efficiency? What is your mashtun like? False bottom, manifold? Size, shape? Grain bed depth?

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Old 05-18-2008, 05:04 AM   #7
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Sounds to me like you need to invest in a new thermometer. I regularly get over 75% with AHB crush. What was your process?

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Old 05-18-2008, 05:07 AM   #8
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I have a 5 gallon rubber maid cooler. I used a 5 foot stainless steel braid coiled up as a filter..... no need to worry about a stuck mash with 5 foot of braid. I used 3.2 gallons of strike water, kept at 152 degrees for 1 hour (checked with 2 thermometers) then added 4 gallons of sparge water that was 170 degrees, recirculated a gallon. I checked SG at end of boil. It was 1.040 at 80 degrees and I had 5.3 gallons of wort to ferment.

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Old 05-18-2008, 05:07 AM   #9
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That sounds extremely low. What was your sparge temp.
Edit: Nevermind did not read through. Try hotter sparge water? It helped me some. What was your boil volume?

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Old 05-18-2008, 05:09 AM   #10
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170 degrees F

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