i have searched the web thoroughly and cannot find anyone who has any experience on the matter. not even bad experience... i was going to top off my tank with ethyl rubbing alcohol. i think it would improve the cooling for sure and prevent algae, but i'm not so sure about corrosion and the pump... i have a pre mix from gigabyte in it now and it is been there for a long time (9 months) and it is kind of low. any suggestions/experiences are appreciated. thanks.