You can use hydrogen peroxide sort of as a chlorine! Pour about 1/8 of a cup for every 100 gallons of water. This is even safe for use when you and your friends and family are in the water!
Hot tub filters should be replaced annually. http://www.hottubworks.com/HotTubSpaFilters/HotTubSpaFilterReplacement.php
You can go into your local hardware store or home improvement store and find hot tub filters or you can ask the sales associate in the store in that department to explain the different filters to you.
Hot tub filters contain sand and gravel to filter our impurities in the water via a high pressure nozzle. The pressure must be high enough otherwise circulation problems may occur.
"This depends a lot on the filter and also on how often the hot tub is used. Again, while filters vary, most recommendations are to change the filter once every 6 months, more often if the tub is used heavily."
THE HOT TUB IS TO RELAX
You use a hot tub cover after the hot tub has cooled off. Using it while your hot tub is still warm can cause your cover to break.
What about "pool chemicals in a hot tub"?
for a luxury hot tub it is 15,000
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.
Hot tub cover prices usually depend on the type of hot tub that you own. Hot tub cover prices can range between $100 to $400. It also depends on your income to decide if a hot tub cover is too expensive.
A hot tub is just that a tub of hot water thus, the need for a heater. To reek the benefits and pleasures of owning a hot tub a heater is an essential element to the experience.
Only during the time in which your are in the hot tub. After leaving the hot tub, all prior weariness will have evaporated.