Regularity (Maintenance Schedule); Generic Names For Chemicals - OC Hot Tubs Serenity Owner's Manual

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4. Regularity (Maintenance Schedule)

Prior to each use
After each use
Once a week
Every two to four weeks
Every two to four months
Each time you refill the spa
Once a year

Generic Names for Chemicals

Water Chemistry
Common name
pH Up
pH Down
Alkalinity increaser
Alkalinity decreaser
Calcium increaser
Calcium decreaser
Test the spa water. Adjust chemical levels as necessary.
Shock the water by adding ½ teaspoon of sodium dichlor per 250 gallons or 1 teaspoon
of MPS per 250 gallons.
Add an ounce of oxidizer after heavy bather loads (see page 23 on shocking the water).
Check the filter well and inside the filter pipe for leaves and foreign matter.
Test the spa water. Adjust chemical levels as necessary.
Shock the water by adding ½ teaspoon of sodium per 250 gallons or 3 teaspoons of
MPS per 250 gallons.
If your water source is high in calcium, add stain and scale preventer.
Deep clean your spa's filter (see page 31). How often you clean your filter depends on
how much you use your spa. There is no harm in frequently cleaning your filter and
will only help your spa's efficiency.
Change the spa water. How often you change the water depends on how much you
use the spa. When you change the water, you will need to:
• Clean and polish the acrylic surface (see page 32)
• Clean and treat the spa cover and pillows (see page 32)
• Deep clean the filter (see page 31)
• Refill your spa (see page 6)
Follow the section "Filling and Powering Up Your Portable Spa" on page 6.
Replace filter cartridges if the pleats appear frayed (see page 31).
Usual chemical name
sodium hydroxide
sodium bisulfate
sodium bicarbonate (baking soda)
sodium carbonate
sodium carbonate
sodium bicarbonate (baking soda)
sodium bisulfate
calcium chloride
N/A To decrease calcium hardness, drain several gallons of water from the spa and
refill using a mixture of 75% hard water and 25% soft water, or use a stain and scale
inhibitor.
Common brand names
pH Increaser, pH Up, pH Plus, pH Booster
pH Decreaser, pH Down, pH Minus, pH
Subtractor, Dry Acid
Alkalinity Increaser, Alkaline Up
Alkalinity Decreaser, Alkaline Down
Calcium Increaser, Calcium Up, Calcium Plus,
Hardness Increaser
OC Hot Tubs Owner's Manual
LTR50001045, Rev. N