I never checked the label for Sunshine. Is it a percentage of the calcium? I'd be surprised if 100% dolomite would work. Most calcium pH buffers are a mix. We'd like to see close to 90% calcitic limestone or more, 10% dolomitic, not sure what the limit is, but it screws with the ideal mineral balance. Pro-Mix uses a mixed blend too.
@Doc Bud , did you ever test Berger? Berger
@Doc Bud , did you ever test Berger? Berger