I got one jar of each and decided to use it on one of mine FOWLR that Im changing now to be a reef tank.
Previous to this I was using Deltec kalk stirrer on this tank with RowaKalk.
The RowaKalk finished and I didnt add it anymore.
I started dosing Fiji Gold and Mud after about 3 weeks after the RowaKalk finished in the Stirrer.
Coraline algae started to cover the rocks again after a little decline earler, and some LPS I added to the tank looks very good.
The Fiji Gold does cloud the water thats why I add it just before lights are out, so it doesnt really matter.
Its still too early for me to say if this stuff is good or not, but so far so good.