I'm using "Refresh" for the first time in a 30 gallon display with a 20 gallon sump. Considering rock/sand/sump I'm underestimating at 30 gallon total volume just to be safe. I don't want to overdose so I'm doing one cap full once a day for three days. Turning the skimmer off overnight each day after the dosage. I'm battling a pretty bad green cyano problem. After the initial three day full dose how long should I wait to repeat? How quick will I see a result to know if I even need to do a second dosage? After the tank clears I plan on switching to "Waste Away" at least once a month or when I do a major cleaning.