I have the "Compat" brand enteral pump. It occasionally gives me a FRE FLO (Free flow) error, which drives me nuts.
Anyway, I run the pump with RO water only, and the output is into a kalkreactor, which in turn forces kalk to drip into the sump. That way, I'm not pump kalk. Works amazingly! Cool thing is that these medical dosers have battery backup too!
The thing that annoys me is that the rubber tube is wearing down and I realized that not all pump sets work with all pumps...so it's been a pain finding the correct tubing, though I might try cutting off the old tubing and just replacing that with some stuff I saw at OSH hardware.
V