I tried this on my 2.5 g along with algaefix after excel treatment. 1 day later no change however will report again when I get home (away for 10 days). All I have are ramshorn and mts. Since the tank is so small and no fauna I kept my Redsea nano filter running and added a fluval mini internal filter on full blast. Scared to try this on my 6g edge since its such a closed system and since the algae is at a minimum. Both tanks got out of control after multiple 2week periods of being away. Anyway thanks for sharing this write up, will report again once I get back.