I have no idea how I did this or how this came about - but I have a couple of bottles with crystals on the bottom. I'm not complaining, frankly I love the look. But I did a batch (small backyard style) and filled a bunch of bottles and only one had the crystals. The others are perfectly clear. I've done ~ 60 bottles so far this year and it's only happened twice. I don't believe I've changed my production or bottling method.
Anyhow, just a curiosity question more than anything. All new syrup, not old syrup.
and it happened in a fancy grade syrup (I can't get used to the new names yet) but that's was the only two bottles