Your dealer should provide you with all this information on his "Spa Start Up", however
1. Usually fill tub to about 1 in above the highest jet below the waterline/spa pillow.
2. Fill the spa through the filter compartment, avoid air lock and cavitation when starting.
3. Depends on what chemicals you are using, usually put them in before you get in after circulating the water for about 15 mins.
4. Enjoy your new tub!
Neil O'Donovan
Phoenix Park Outdoor Living
Wilmington, NC
www.phoenixparkoutdoorliving.com