Explosive bubbles

[csk91]

I am sure this has been asked before but what is the deal with the huge explosive bubbles I am experiencing when finishing my syrup? I am just a hobby guy with 25 taps in my yard. I was finishing a small batch today and as the syrup was getting to temp I started getting huge bangs and explosive bubbles. It’s actually pretty dangerous as I am looking down into the pan! Anyway what are these bubbles all about and more importantly how do I avoid them? Thanks

[Z/MAN]

It sounds like you have a niter buildup laying in the bottom of your pan. Clean your pan before you boil again.

[csk91]

Thanks. I noticed a lot of sugar sand but this was a small batch I was finishing (about 1/2 gal) I got it up to 217 and then filtered it through a wool filter into my finishing box and it started happening in the clean pan after only a few minutes. I noticed it intensifies when I increased the heat.

[csk91]

I should also point out that this batch came out with sugar sand in the finish bottles so I am doing something wrong

[donka]

I've had my thinner stainless pans do this before and shooting syrup out of the pan. When I switched to a heavier gauge stainless it stopped. Not sure if that's what's happening but mybe give it a try.