I made a porter using the Beer Smith app which is pretty much a standard porter recipe. I used 6 oz of cane for a 5 gal batch. I aged it for a month. It’s pretty carbonated at room temp, but when I chill it it looses it carb. It tastes great but lacks the fizzle. Any suggestions?
Sorry all, I did use corn sugar. It’s all I use. This is the only batch that lost carbonation when chilled.
OH! you may have hit it right there. Could there have been a weight vs volume error here?
White Sugar (Granulated)
Cups Grams Ounces
2 Tbsp 25 g .89 oz
1/4 cup 50 g 1.78 oz
1/3 cup 67 g 2.37 oz
1/2 cup 100 g 3.55 oz
2/3 cup 134 g 4.73 oz
3/4 cup 150 g 5.3 oz
1 cup 201 g 7.1 oz
As Babalu87 says: cane sugar (any sugar) does the same thing, and actually works better because the yeast find it easier to consume giving more predictable results.
As far as the OP having carbonation at room temp but not fridge temps, I’d give it another weak or two and try it again. The reason why it seams more carbbed at room temps is because the cold temps can hold more Co2 in suspension so it will foam less when cold.