Is there any difference betweem Seachem Excel, and API co2 booster? I am having an issue with Staghorn algae, and have been using co2 booster. I have heard that excel will actually help eliminate Staghorn. I have reduced the light by half, cut down the photoperiod to 7 hrs per day and have been double dosing API co2 booster. Just wondering if excel would work better! Any other suggestions to help rid the tank of this curse are very welcome!!