Well, if Coral Snow & Zeobak together count - I just started using them last month. I was having an issue with cyano in one of my tanks - and doing all the usual and tried and true methods - and just could not clear it up completely. After about 1.5 weeks of every other day dosing with a combination of KZ coral snow & Zeobak - cyano is gone. After using this I also noticed that my water was crystal clear ..... thought the water was clear before but after the snow/zeobak treatment it was like there wasn't any water in the tank. After the first initial every other day dose I dropped down to 2x/week. It seems to me that I have a bit better colors and polyp extension - and the skimmer is pulling out even more than it had been prior to the dosing.
So, just to see - I also dosed it to my other tank that was not having any issues with cyano or anything else - other than some faded colors (high light, low nutrient in my opinion). This tank I've been dosing about 2x/week .... and have noticed the same thing - increased water clarity, colors deepening and more polyp extension.
Did it make a huge difference ..... well, in the tank with cyano, yes ..... in the other no ...... but I perceived enough of an improvement to continue its use .....:wink: