Why should the tubing be visually inspected every 30 minutes during haemofiltration with Duosol with 2 mmol/l Potassium?

During haemofiltration with Duosol with 2 mmol/l Potassium, inspect tubing every 30 minutes for rare white calcium carbonate precipitates, particularly near the pump and heater, which can appear substantially after treatment starts; if precipitation occurs, immediately replace the solution and tubing and carefully monitor the patient.