Green dust grew back

• pH:
• Temp:
• KH: 5
• GH:
• NH4:
• NO2:
• NO3:
• PO4: off scale
• Iron:
• Dosing: 20 ml flourish, 20 ml Excel, 2 tsp KH2NO3
• NO3:PO4 Cumulative Dosing Ratio:

Notes:
Cleaned the tank last weekend, green dust algae grew back, though. Letting the tank sit for 4 weeks did not work. In fact, a lot of green hair algae has been growing as well. The CO2 tank started to run out last week. The change in pressure changed the rate of CO2 flow, increasing it to the point where two of the emerald rasboras died. Replaced the tank yesterday. Still dosing over 36 ppm NO3 daily, there's still a lot of PO4 even though haven't dosed any for the past week.