Water based products

Firstly, here's the link to the page where you'll find the "solubiliser" (Polysorbate 20)which I use to make all my crystal clear water based products. The method is to add oil/solubiliser in equal measure and rigorously mix them. Then add a few drops water whilst stirring, if it starts to cloud then add a few more drops of solubiliser whilst stirring till it clears again. Then repeat until it remains clear at which point you can add as much water as you want - how much solubiliser you need depends on which oils you're using - Lavender takes almost 3 times as much solubilisr as oil. Regarding your last point, the essential oils (assuming you are using quality oils) are anti-bacterial etc so you need add nothing else.