water & ?
 

Hi, I've an alloy tank which is not anodized, is the any thing which can be added to the water that won't corrode the tank?, will isopropanol work? thanks

Depends on the type of ali you use, some will last longer than others, it will eventually all corrode. Some peole put some oil into the methanol to coat the metal surface to give some kind of protection.

Make sure your pump can put up with oil or hydrocarbons (ask your supplier). We know our equipment can not withstnad the slighest amount of hydrocarbon.