Water change

• pH: 6.8
• Temp: 74-76
• KH: 5
• GH:
• NH4:
• NO2:
• NO3: 5
• PO4: 0.2-0.5 (before dosing)
• Iron:
• Dosing: 5 mL Flourish, 20 mL iron chelate (2 ppm), 15 mL KH2PO4 (0.45 ppm)

Notes:
50% morning water change:
3 tsp Equilibrium
2.5 tsp baking soda
0.5 tsp epsom salts
20 mL Amquel+

I also mixed up more nitrate and phosphate solutions:
0.5 tsp KH2PO4 in 250 mL tap water: 5 mL = 0.15 ppm PO4
3.5 tsp KNO3 in 250 mL tap water: 5 mL = 1 ppm NO3

I cleaned out the eheim filter, which was pretty clogged up. Afterwards, the flow rate increased, which caused the eheim surface suction extractor to start a slightly annoying knocking sound. The suction filter has a flow valve which starts rattling with higher flow rate. The manual recommends getting an optional t-junction which divides the flow between the extractor and the original filter intake for filter models 2215 and higher. You can turn on and off the suction action, so when it's turned on, the rattling stops since the flow is divided between the suction and the bottom filter intake.