Where to get potassium hydroxide in Hilo

Can’t make your own home-made equivalent? If your recipe calls for 1kg of potassium hydroxide, use 3kg of wood ash, put it in a container that allows you to compact the ash and has holes in the bottom. For every 1kg of ash, run 3l of hot water through it. If you have the equipment to measure the pH, it should be around 13. Corn stalk and sunflower ash are good sources of potassium. Bamboo, as well as any other grass, is also excellent.