Everything is conditional:
Normal use (at track up to 3 consequitive weekends), empty every 3 to 4 weeks depending on amount of nights staying over at track using treatment for black. I let gray level climb to rinse hoses after empty black.
Parked at campground or Disney, leave gray open until day before leaving. Black stays closed until 2/3 on panel. Then if needed, water added for final empty then rinse hoses with gray after final empty.
I use treatment except when parked at campground or Disney.
Should unit not be used for 2 weeks, I add water (1 bowl full) while warming engine and exercising generator. Never let black go dry, I did that once.
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