BMW Repair: 1995 525 BMW, 525 bmw, coolent

Question
Coolent level on my 1995 525 BMW is low. Water is going some where, not leaking out and oil seems normal. Where else could water be going? Just replaced radiator and water pump. Have to add water daily. Gauge indicates no abnormal temp.

Answer
Pressure checking the system with a pump is the first step to check for leaks.
Have you looked at the sparkplugs for any discolouration? If you use reg green antifreeze and you have an internal leak it will show up as a green tint to the plug.
No antifreeze smell from the heater core?