Originally Posted by nubs
How would debris be in the gray tank when all that goes in is water. My camper is only 14'6 and has one A/C
This is simply you do wash dishes and your face and hands with soap? Will this will lead to debris forming in the waste water holding tanks. Not everything will drain out when the tank is emptied. This left over debris will cover the gage sensors in the tank (my wife refers to this as soap scum). Thus showing that your tank is either 1/3 or 2/3 full. When water is placed in the tanks the debris may or may not be washed off of the sensors every time.
This is why I stated you need to use a cleaning product in the holding tanks every once in awhile.
Now with your A/C it maybe a 13,500 BTU unit which on a 80 Deg. day could cool your trailer but it will take time. At 90+ day this may take all day to cool the camper. You also need to help by blocking the sunlight from entering the trailer and warming it up more than required. Use reflective panels and some additional curtains to help. Plus use a fan to move the air around in your unit. We travel with two fans all of the time in our unit to help with the cooling plus the two A/C units that we have.