Green algae improved

• pH:
• Temp:
• KH: 6
• GH:
• NH4:
• NO2:
• NO3: 20
• PO4: 1.5
• Iron:
• Dosing: 3 ppm K, 1.2 ppm PO4
• NO3:PO4 Cumulative Dosing Ratio:

Notes:
Green algae seems to have decreased noticeably after the water change, even the green water has improved. Perhaps the difference was switching the CaSO4 to CaCl2? Too much S from all the other fertilizers?