I used this for kalk dosing but decided to switch to 2 part. I bought it used and had it in service for about 8 months, running up to 15 minutes/day. Silent, strong, and solidly built. Asking $70 shipped. The price is firm.
https://www.avastmarine.com/products/peristaltic-pump-for-auto-top-off
Thanks for looking,
Tom
https://www.avastmarine.com/products/peristaltic-pump-for-auto-top-off
Thanks for looking,
Tom