I am considering buying an overhead stirrer and need an advice where to start (specifications). Formulating skincare is a hobby for me and I can't invest several thousand dollars in a stirrer, however using a stick blender is not an option as it can't mix ingredients like sodium carbomer or silica powder. Also, some polymers like Aristoflex form a lot of air bubbles when mixed with a stick blender. The maximum batch size I make is 400 ml (from 100 to 400). I only make oil in water lotions (no pomades or very thick products). Can someone advise what would be the best option for such small batches? Or at least what specifications it should have (viscosity and speed?).
Thank you in advance!