Is there any difference? Some say the Kalkwasser they purchased tends to mix better and have less unused residue. I have always just used Mrs Wages Pickling Lime.
I’ve never seen anyone compare different brands for the amount of calcium carbonate residue present, but I don’t think it is likely to be a large amount in any brand, and it isn’t typically an issue to worry about, IMO. [emoji3]
I want to Thank You for all of your time you have invested in sharing your knowledge and helping move this hobby to the next level over the past years. Your willingness to give your time is the best gift one could share.