I am anticipating the arrival of my new Everlast Power Cool 300 soon, (this month I hope) so I was wondering, do I need coolant ? It is not likely to freeze down here. Are there other benefits to having coolant like anti corrosion, rust inhibiting or just keeping the water from getting full of algae? Is there a brand that is better than the rest or are they about the same.Where is a good place to buy this coolant? Sorry for the string of questions but I just want to be ready when my cooler arrives.