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Old 02-03-2011, 06:39 PM   #11
sjbeerman
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You said you calculated the pitching rate for a 1 L starter, but then placed it in the flask and it was 700 mL??
The picture above shows about 1.2 L. How are you making the starters and what was the volume of the starter? Are you making it directly in the flask or are you making it in another container then transferring to the flask? It's possible the starter was not large enough.

I always add the DME (weighed out) in the flask then add enough water until it equals my final volume then add nutrient and boil for 15 min..

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Old 02-03-2011, 08:15 PM   #12
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I dont trust the non pyrex flask I have with boiling in it. That starter was a 1L. I measured out a little more water to account for boil off. call it 1.1L. I use the ratio of 100 grams DME per liter of water. after a slow boil for 15 minutes I only had about 800ml. so I took a gravity reading and it was 1.060! I added enough boiled water to dilute it to 1.040ish. let it sit on the stir plate 24hrs then refrigerated because I wasnt going to be using it for 2 days. It just doesnt look like much volume to me. Should I pitch that or start over?

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Old 02-03-2011, 09:58 PM   #13
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I don't see any reason why the starter shouldn't be good. I typically let mine go 48 h before cold crashing, but all activity should be complete within 24 h. To make only a 1 L starter, I assume your yeast had to be pretty viable. I also haven't topped off my starters before because I haven't seen anywhere that said it should be done. Not that I believe that is an issue or anything, I just don't have experience doing that.. Do you aerate the wort before pitching the starter? I'm not sure the starter is the issue here, but I wouldn't rule it out at this point..

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Old 02-03-2011, 11:15 PM   #14
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I shake it around in the flask or growler depending on how I'm doing it. If I'm doing 2 beers back to back I only have 1 stir plate so I have to do one on the plate and one with intermittent shaking in a growler. I just bought an aquarium pump and diffuser stone today so I'll start using that. If I use that how long should I aerate the starter? 10 minutes good considering the volume?

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Old 02-04-2011, 02:38 AM   #15
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I think you'll find that you won't be able to aerate that long with a pump due to bubbles coming out of the flask. If you only do intermittent shaking or aquarium pump then the starter will have to be larger due to less growth.

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Old 02-04-2011, 03:59 AM   #16
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Well how does everyone else aerate their starters?

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Old 02-04-2011, 04:47 AM   #17
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I just shook mine every hour that I could for the first 18 hours. Only have done one so maybe I'm not the most reliable source

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Old 02-04-2011, 04:53 AM   #18
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What temp are you fermenting at...... is it fermenting outside of a heated area?

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Old 02-04-2011, 04:59 AM   #19
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Not to stray too far off topic, but my friend and I are getting ridiculous attenuation with dry yeast. With US05 we've done IPAs, APA, Brown, Rye IPA and they've all either over attenuated, or we've hit our numbers. We used US-04 on a 9.5% Impy stout, and nailed our numbers perfectly, with an insane fermentation. We're not doing starters either. Rehydrate, cool to pitching temp, pitch. I started with dry yeast (like most people) when I first started brewing, then I went to liquid, now I'm back to dry. I started having attenuation issues with liquid yeasts--starters and all--as well. Just some food for thought.

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Old 02-04-2011, 05:48 AM   #20
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fermenting at 68 for 2 weeks solid.

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