Fastjake1234
Member
My uncle gave me a starter kit and some beers his friend made they have been sitting for at least 8 months he said.... As soon as I opened the top they foamed as shown in the picture... Anybody know what could be the cause?

one of these things
1. you added too much priming sugar.
2. you did not check the specific gravity with a hydrometer before adding the priming sugar and bottling
3. you did not mix in the priming sugar well enough so some bottles will be overcarbonated and some will be too flat
4. your beer is infected with wild yeast, etc.