I have a dart frog. In one of the books I have it says not to use water that has been purified by reverse osmosis. I have used dasani bottled water which is purified by this method and the place I bought my dart frog just said to use bottled or declorinated water. I also noticed that on a dart frog site there were reverse osmosis machines for sale. I am confused. Does anyone know if it is okay to use the water purified by reverse osmosis?