I just brewed my 2nd batch of beer 2 nights ago. It was my first solo batch and also the first time I was brewing a recipe I developed myself. I had a few questions about things that came up.
My only fermentable was 3lb of light DME in a 3 gallon (full boil) batch. This should put me at roughly 1.043 for my OG, but I measured 1.049. I just dumped a full 3-lb bag of DME into the pot without weighing it first. Is there generally a bit of overfill in a bag of DME? Should I have weighed it out first? Any other reason my OG would be so high?
All my calculations for IBU were based on roughly a 3 & 1/4 gallon average boil volume (start at 3.5 gallons, boil down to 3ish), but when I added my DME my brew kettle was probably closer to 4 gallons to start because of the added volume of the DME. Do I have to factor in this extra volume in my IBU calculations? Will I end up with a higher IBU than I calculated?
My @$#%ing digital thermometer’s calibration got all messed up while I was cooling my wort (I was wondering why it took so long to come down those last 20 degrees). So I ended up pitching a vial of WLP001 to wort that was about 59F. I have the fermenter in the warmest part of my basement (about 64F ambient). Last night (24 hours later) the wort was reading 64.5F and I saw 1-2 bubbles/minute coming through the airlock. I’ve read that WLP001 has an optimal temp of 68-73, should I bring the fermenter into a warmer room to get it to warm up a bit, or will it be ok at its current temp?
1.) That’s pretty darn close for OG. A slight variation in volume or weight could account for the difference. I wouldn’t worry about it.
2.) I think you’re close enough. IBUs are an approximation, anyway.
3.) You’re better off at lower temps than higher. The ambient temp doesn’t matter, it’s the wort/beer temp. Fermentation will add a few degrees to the temp. Leave it where it is.
Accurate weights and volumes are required for hitting your targets. Calibration of your hydrometer is necessary to be sure about your measurements. Also your final volume measurement is key to the anticipated OG.
I agree with Denny in that your IBU’s will be in the ballpark. It’s diificult for the homebrewer to actually measure IBU’s anyway so I wouldn’t concern yoourself with that as long as the hop character is desirable.