CalderaSpas vacanza series, Owner'S Manual

WaTer QUalITY aNd MaINTeNaNCe

24

MAINTAININg ThE SANITIzER lEvEl

A.  Sanitizer is extremely important for killing algae, bacteria and viruses, and preventing unwanted organisms from growing in the spa. At the same time, you don’t want 

too high a sanitizer level, or it can irritate your skin, lungs, and eyes.

B.  Always maintain the sanitizer level in your spa at the recommended level for each type of sanitizer.
C.  Watkins recommends the following sanitizer:

• 

FrOG

  sanitizing system (mineral and bromine).

D.  Watkins also approves the following sanitizers:

•  Sodium Dichloro-s-Triazinetrione (sodium dichlor or chlorine)
•  Biguanide
•  Bromine

WarNING:

 DO NOT use tri-chlor chlorine or any type of compressed bromine or chlorine, acid or any type of sanitizer which is not recommended by Watkins 

Manufacturing Corporation.

FrOG

  wATER CARE SYSTEM 

(ThE 

FrOG

 MINERAl CARTRIdgE IS NOT APPROvEd FOR USE IN CANAdA.)

The 

FrOG

 Water Care system is comprised of the following products:

THe FrOG MINeral CarTrIdGe

. This cartridge introduces minerals into the spa water, inhibiting bacteria growth.

THe FrOG BrOMINe CarTrIdGe (BCdMH). 

The only recommended sanitizer that will work in conjunction with the 

FrOG

 Mineral cartridge.

IMPOrTaNT:

 In addition to regularly testing and balancing your spa water, a weekly "shock treatment" is required.  The shock treatment quickly destroys any remaining 

contaminants while revitalizing the bromine in the water.

To weekly “shock treat” your spa, we recommend that you use either 

MONarCH 

MPS Plus or sodium dichlor (chlorine).  Sodium dichlor may be a more appropriate 

weekly shock for those users that experience heavy bather load conditions.

The following optional products can be used in conjunction with the 

FrOG

 Water Care system:

MONarCH MPS PlUS NON-CHlOrINe SHOCK (MPS/Monopersulfate) 

is an oxidizing chemical used to prevent the buildup of contaminants, maximize 

sanitizer efficiency, and improve water clarity. When used in conjunction with the 

FrOG

 system it oxidizes particulates in the spa water.

IMPOrTaNT NOTe:

MONarCH

 MPS Plus is an oxidizer, not a sanitizer.

MONarCH CHlOrINe 

is an efficient sanitizing chemical for spas and can be used for the required weekly “shock treatment” when using the 

FrOG

 water care 

system. Watkins Manufacturing Corporation recommends the use of sodium dichlor-type granulated chlorine because it is totally soluble and nearly pH neutral.

MONarCH COrONa dISCHarGe (Cd) OzONe

 is a high output ozone system and is the only ozone purification system approved for installation in your 

Caldera

  Spa. The 

MONarCH

 ozone system utilizes CD technology to produce 

a higher concentration of ozone than is produced by a competing 

chip style CD or ultraviolet light ozone systems.

THe WaTKINS WaTer MaINTeNaNCe QUICK reFereNCe GUIde

Ideal range (ppm) 

What Chemicals to Use

    Steps 

Minimum  Maximum  To raise 

To lower

  1  Total alkalinity 

40 

120 

Sodium Hydrogen   Sodium Bisulfate

Carbonate, or 

Sodium Bicarbonate 

  2  Calcium Hardness  50 

150 

Calcium Hardness 

Use a mixture of 

Increaser 

75% hard water  

and 25% soft water  

or use a Stain and  

Scale Inhibitor

  3  pH 

7.2 

7.8 

Sodium Hydrogen 

Sodium Bisulfate

Carbonate

  4  Sanitizer 

See section on Maintaining the Sanitizer level