I had an Alt and an amber lager conditioning in my fridge at 34F a few weeks back. Both were not clearing at all, despite being at that temp for about 4 weeks. I prepared some Knox gelatin by mixing in the powder and heating to 165F. I let the mixture cool for about half an hour then poured half into each carboy. I then went out of town for a few days and expected to see major clearing when I returned, but it didn't happen. The gelatin seemed to have coagulated at the top of both carboys, moreso in the lager. So I gave each carboy a stir to break things up and hopefully settle it out. I didn't stir so much as to stir up the floc'd yeast on the bottom, just enough to break up the gelatin.
Last night I decided to bottle the Alt. The gelatin had settled out nicely and the beer was clear. I checked on the lager and it was definitely not the same - large chunks of gelatin were suspended throughout the carboy. Obviously I can't bottle it like this.
Any suggestions? Did I do something wrong with the gelatin?