Pumping KOH

This may not be a 'general electronics' question.. but I'm wondering how to transfer potassium hydroxide solution for my soap making machine.. I have silicone tubing but it will probably get damaged from the KOH. Any tips?

I am using small aquarium pumps for my oils all weight controlled by arduino.. I'm guessing I can't use them for KOH..

here are my pumps: https://www.amazon.com/gp/product/B0744FWNFR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

and my hose: https://www.amazon.com/gp/product/B06XCRCC78/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Well there is the peristalsis pump. Basically rotating rollers pushing liquid through a flexible tube by squeezing the tube. There is no contact between the inside and outside of the tube, hence used for medical applications.

I'm guessing I can't use them for KOH.

No need to guess. Of course aquarium pumps are unsuitable. As for the tubing, research the conditions that the tubing material is rated to withstand.

If that information is not available from your usual source, change sources. Laboratory and industry suppliers make this information readily available, as it is absolutely required for health and safety management.