Planted Tank Guru
Join Date: Jun 2012
Location: Gainesville, FL
Your nitrate could stand to be a little higher over 10ppm. As far as the algae, increase your CO2. Drop checkers aren't a very accurate way to judge CO2 concentrations. If you look at a CO2/KH chart, which again isn't 100%, you're well below optimal; around 8ppm of CO2.
The one sure way to dial it in is watch your fish, plants and algae for a response. Increase the CO2 output a very small amount and watch the fish/shrimp. If after 2-3 days you see no change repeat that increase. Do this until you see signs of distress, gasping at the surface, lethargy or any erratic behavior. Then reduce it to the output previously. It takes time so don't rush it. That will dial it in better than any testing method available.