Diet and nutrition. You won't usually need to keep to any special diet. A healthy, low-fat, nutritious and balanced diet is important for everyone, but if you're on steroids it's particularly important because these can increase your appetite and cause weight gain. Try not to over eat, and cut down on fatty and sugary foods and others which are particularly high in calories.
If you start out with 95 degree F and a relative humidity of 25%, the swamp cooler can get you 75 degrees and 50% relative humidity. That humidity level is still pretty comfortable. If you start out with 95 degrees and 40% rel. humidity.
Since most retailers and manufacturers don't have specific estimates, consider using 7 to 9 gallons / 26 to 34 litres per hour as an average estimate, realizing your actual numbers will vary. Multiply average water use by the number of hours you plan to use your swamp cooler. Using it for the hot hours of 11 a.m. to 3 p.m. would mean 4 hours of use. 7 to 9 gallons / 26 to 34 litres per hour for 4 hours would be 28 to 36 gallons / 104 to 136 litres per day. Then simply multiply that number by what your water company charges per gallon / litre of water.