I live on a farm with borehole water and septic tank system. The water is high in calcium. I noticed that there is a white (paste like) sediment in the pipe (cast iron pipe) of the toilets. How do I get rid of this and clean all the pipes

Hi Maplotter...

Why are you concerned about the white sediment... are the toilets giving you any problems? Let us know more...

Mark

The water is high in calcium What you're seeing is calcium carbonate. This should also be clogging up the screens on the aerators in your faucets not to mention the build up in your water heater, CRL or Lime Away will desolve the calcium.
If you find calcium throughout the system consider a whole house filter. Good luck, tom