It takes about 3 days
About 3 minutes! But if its a big tub about.......5 minutes.
It depends on how slow you are
Depends how big your hot tub is. Mine is about 150 gallons or 1,200 pints.
It depends on the size of the tub.
That could heavily depend on the total capacity of the tub, and on how full you fill it.
Most roman tub fillers dispense 9.5 gallons per minute with 60 psi. So if your tub is 70 gallons you would be waiting about 7 to 8 minutes. While you sit in the tub.
Hot tub covers can have long lives if they are cared for properly. Hot tub covers are mostly affected by dirt and sunlight so keep it clean and perhaps put a tarp over it if the hot tub is in direct sunlight.
Fill a gallon bucket, timing how long it takes to do so. Then fill your hot tub using the same source... example: if you filled the bucket with a hose, then fill the tub using the same hose. Then time how long it takes to fill the tub and divide the time it takes to fill the tub by the time it takes to fill the bucket and then you know how many gallons it is.
If you take proper care of your hot tub cover it should last for the life of the hot tub. For more information visit http://www.greatnorthernhottubs.com/faq.html.
Very young children should not be in a hot tub at all, older children can safely be in a hot tub for about 10 minutes. Make sure they drink plenty of fluids before and after going in the tub.
Depends on what temp the water starts at and how hot you are expecting it to get. It will also depend on how powerful your heating element is for the hot tub. Typically you can expect about 1-2 degrees an hour. Within 24 hours a 500 gallon tub is typically hot! Leave the cover on the tub when heating it up. If you leave the cover off, a lot of heat can escape.
500