In hot climates the water system will get funky in just a short time. If I was you, I would drain the hot water tank and low point drains and sanitize the system with bleach.
In the future, if you are not going to use the trailer for a week, drain everything, every time.
2017 Salem Villa Estate 395RET-Coming soon
2011 Coachmen Freedom Express 295RLDS- Sold
2015 F-250 FX4 SUPER DUTY 6.2L Gas 4WD SuperCab XL 3.73 rear / 158" WB / 8' bed. Factory anti-sway and brake controller