Zodiac DuoClear 25 User manual

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DuoClear™Cartridge
Owners Manual
Features Nature2Technology†
EPA Reg. No. 67712-1
EPA Est. No. 67712-FL-001
We ask you to take the time to get familiar with this manual.
Thank you for purchasing a DuoClear Cartridge with Nature2Technology.
We believe the more you know, the more enjoyable your family’s swimming
experience will be – and the more you will reduce the time, effort and cost of
maintaining your pool. Pool owners who switch from conventional chemical
programs to the DuoClear System* spend less time maintaining their pools.
Every pool has its own characteristics of water type, amount of sunlight, etc.
The recipe included in this manual will help insure good water quality for your
pool. Remember, your authorized Zodiac dealer can provide professional
advice and service.
*The DuoClear System consists of the patented Nature2technology used in conjunction with a
chlorine delivery device or 0.5 ppm of an EPA registered chlorine pool product.
†Nature2technology consists of the minerals silver and copper.
EQUIPMENT UNDER PRESSURE
• Always turn pump off prior to installing or
changing DuoClear cartridge. Your pump/
filter system is operated under pressure
and the pressure must be released
before you begin work. Please see your
pump/filter owner’s manual for further
instructions.
PREVENT CHILD DROWNING
• Do not let anyone, especially small children, sit,
step, lean or climb on any equipment installed
as part of your pool’s operational system.
Locate the components of your operational
system at least 3 feet from the pool so children
cannot use the equipment to access the pool
and be injured or drown.
LOW CHLORINE RECIPE
• You must strictly follow the low chlorine recipe
included in this manual to maintain proper water
chemistry and avoid health hazards. Failure to
follow these instructions can lead to sickness
from bacteria and other noxious organisms.
Failure to heed the following can result in permanent injury, or drowning.
Safety Instructions - Important Information Please read prior to installation
DuoClear Cartridges have been designed to sanitize swimming pools from 10,000 to 45,000 gallons depending on cartridge model. Make sure
that your DuoClear Cartridge corresponds with the proper vessel and is appropriate for your pool size by consulting the chart above.
CARTRIDGE CAPACITY
DuoClear 25 Cartridge 10,000 - 25,000 gallons
DuoClear 35 Cartridge 25,000 - 35,000 gallons
DuoClear 45 Cartridge 35,000 - 45,000 gallons
PRECAUTIONARY STATEMENT
HAZARDS TO HUMANS AND DOMESTIC ANIMALS
CAUTION
In the unlikely event that a cartridge breaks, mineral media should not be ingested
by humans or animals as it may cause gastric distress.
FIRST AID
IF INGESTED: Call poison control center or doctor immediately for treatment advice.
!ATTENTION
CAUTION
!
The DuoClear Pool Sanitizer is designed only for residential swimming pools.

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DIRECTIONS FOR USE:
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
DUOCLEAR™COMPATIBILITY
DuoClear Systems* can be used with all types of pool chemical treatments available except bromine and bromide based chemicals, biguanide
products (Baquacil1, Softswim2or Revacil3) and copper based algaecides.
(1A Trademark of Avecia, Inc., 2A Trademark of Biolab, Inc., 3A Trademark of Mareva, Inc.)
Important: When converting either a biguanide or bromine treated pool to the DuoClear System*, the pool must be completely drained and refilled.
Then follow the DuoClear cartridge start-up procedure below.
Start Up
•BeforestartingupanewDuoClear cartridge, clean debris and algae out of the pool and pool equipment.
Important: Do not install the new cartridge until the pool water is clean and chemically balanced.
•BalancepoolwaterbeforeinstallingDuoClear cartridge.
- pH 7.4-7.8
- Calcium hardness 200-400 ppm
- Total alkalinity 80-150 ppm
Consult with your Zodiac Dealer for specific water balance instructions.
Balance the Water
To find out if your pool water is balanced:
• takeawatersampletoyourdealertobetestedregularly,or
• askyourdealertorecommendapooltestkitforwaterbalance.
Element: pH
Range: 7.4-7.8
Element: Calcium Hardness
Range: 200-400 ppm
Element: Total Alkalinity
Range: 80-150 ppm
If it’s too low:
If it’s too high:
If it’s too low:
If it’s too high:
If it’s too low:
If it’s too high:
The surface of your pool can become etched. How to fix: Add pH increaser.
Metal parts in the pump and plumbing will corrode.
“Scale” forms on the surface of your pool. How to fix: Add pH decreaser.
The water can become cloudy.
Equipment can become damaged.
Water is less stable. How to fix: Add calcium hardness increaser.
In plaster pools, the calcium is taken out of the plaster,
causing the surface to deteriorate.
Rough, discolored deposits (“scale”) will form on the How to fix: Drain or dilute the pool water.
pool surface and inside pool equipment. Consult your dealer.
It provides no buffer so that you constantly get fluctuating How to fix: Use an alkalinity increaser.
pH readings, which can damage equipment and pool surfaces.
White deposits (“scale”) form on the tile line. How to fix: Add acid to bring alkalinity down.
The plaster on pool surface becomes rough or discolored.
The water becomes cloudy or milky white.

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Install the Cartridge
1. Install the cartridge after water is balanced. Refer to your DuoClear vessel operating manual for additional instructions regarding your
particular model’s installation.
2. Superoxidize the pool water with chlorine according to manufacturer’s instructions to burn off contaminants and activate cartridge.
Important: Initial superoxidation with chlorine is required to burn off contaminants and activate cartridge.
3. Run the circulating pump either:
•24hoursadayfor4days,maintaining1-2ppmfreechlorinethroughout,or
•6hoursadayfor14days,maintaining1-2ppmfreechlorinethroughout.
4. Let chlorine dissipate to 0.5 ppm once start up period is completed.
•Donotenterthepoolifthefreeavailablechlorineresidualisover3ppm.
Low-Chlorine Recipe
Ingredients:
• DuoClear Cartridge
• Chlorinegranules,tablets,liquidorgenerator
• pHandtotalalkalinityadjustingchemicals
• Calciumhardnessincreaser,ifneeded
• Watertestkit
Once the 4-day or 14-day start-up period is done, allow the free available chlorine residual to drop
to 0.5 ppm (by reducing the amount of chlorine you add) then:
When: What to do:
Every day Run pump and filter at least 6 hours every day.
Once a week Balance pH and total alkalinity.
Twice a week Check chlorine residual; add chlorine to maintain at least a 0.5 ppm range using the chart below.
As needed If water is hazy, superoxidize with chlorine according to manufacturer’s instructions.
Additional shocking is recommended following rainstorms or heavy bather load.
Do not re-enter the pool if the free available chlorine residual is over 3 ppm.
Recipe
There is one recipe for maintaining clean, clear, sanitized water with minimum time and effort.
This recipe provides the easiest and most economical way to care for your DuoClear pool.
Add the following amounts of chlorine per 10,000 gallons of water to increase free chlorine by 0.5 ppm.
Type of Chlorine % Active % Available Ounce Quantity Gram Quantity
Containing Compound Ingredient Chlorine Content Required Required
Sodium Hypochlorite Liquid 5.25 5.25 12.7 361
Sodium Hypochlorite Liquid 9.2 9.2 7.3 206
Sodium Hypochlorite Liquid 10 10 6.5 184
Sodium Hypochlorite Liquid 12 12 5.6 158
Calcium Hypochlorite 65 64 1.1 30
Dichloroisocyanurate 99 62 1.1 30
Lithium Hypochlorite 29 35 1.9 54
Trichloro-s-triazintrione 99 90 0.7 21
Chlorine Gas, from any source 100 100 0.7 19
including chlorine generators
Provide Filtration/Circulation
To manage: You need to:
Circulation Follow the manufacturer’s directions for keeping the circulating pump in good working order and operate it at least six hours a day.
Consult your Zodiac dealer for optimum run times.
Filtration Check the pool’s filter periodically and clean it as recommended by the manufacturer.

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Algae may
be caused by
insufficient levels
of oxidizer and/
or inadequate
water circulation.
Frequently caused
by improper start
up. See section on
Start Up and Install
the Cartridge.
Troubleshooting Guide Consult your Zodiac Dealer for additional assistance or call 1-800-822-7933.
Problem What to look for Treatment
Cloudy water Poor filtration Slow filter turnover rates 1 Backwash and clean filter.
2 Run filter for 24 hours.
3 Increase run time per day.
Algae growth Hazy pool water; may have slightly Superchlorinate water with chlorine according to
green appearance. manufacturer’s instructions and brush pool walls.
Unbalanced water 1. High hardness Balance the pool water.
2. High TDS (total dissolved solids)
3. High pH
4. High total alkalinity
Algae Green algae Pea green color; attaches to pool walls; 1 Check pH and adjust if necessary.
sometimes colors the entire body of water 2 Superchlorinate with chorine according to
manufacturer’s instructions and brush pool walls.
3 Repeat steps 1 and 2 until algae is gone.
Black algae Black spots on pool walls 1 Brush affected areas.
2 Superchlorinate water with chlorine according
to manufacturer’s instructions.
Mustard algae Yellow or brown film on steps or walls 3 Add algaecide.
4 Vacuum pool.
5 Repeat steps 1 through 4 until algae is gone.
Note: Regular algaecide treatments are recommended for outdoor pools that experience persistent algae problems.
Do not use algae treatments containing either copper or sodium bromide.
Stains Blue/green Copper or iron from pool equipment 1 Adjust pH and total alkalinity to ideal ranges.
corrosion or water supply 2 Vigorously brush stained areas.
3 Add sequestrant.
Red/brown Iron or manganese from equipment 4 Run filter.
corrosion or water supply. 5 Twelve hours later, superchlorinate the pool.
6 Test and balance water.
Black Manganese in water supply. 7 Test pool water for dissolved metals.
Metal tarnishing High native mineral content in Clean with soft cloth and mild detergent.
water; unbalanced water Test water for minerals; use a sequestrant;
maintain water balance.
Scale Crusty deposits on High pH and high total alkalinity Adjust pH and total alkalinity to ideal ranges.
pool surfaces
High TDS (total dissolved solids) 1 Replace a volume of pool water with water
or high hardness levels low in hardness and dissolved solids.
2 Use sequestrant to prevent scale buildup if high
hardness levels are a continuing problem.
DuoClear Cartridge Replacement Intervals
Monitor the cartridge replacement light on the DuoClear control panel to identify the date on which the cartridge should be replaced. Always turn
pump off prior to installing or changing a DuoClear cartridge. Your pump/filter is operated under pressure and the pressure must be released before
you begin work. Please see your pump/filter owner’s manual for further instructions.
A cartridge lasts six (6) months or one season, whichever is shorter. The cartridge should not be used longer than six (6)
continuous months.

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Winterizing Your Pool
Use these steps as a guide. Consult your dealer for specific information in your area.
Warm Climate
1. Reduce the number of hours the pump runs since the cooler weather
decreases the spread of algae and other pollutants.
2. There is no need to superoxidize the pool during cool weather unless
the water becomes cloudy (as may occur after a winter storm). See Cloudy
Water in Troubleshooting section.
Cold Climate
1. Check total alkalinity and pH of pool to make sure that they are in proper balance.
2. Vacuum the pool bottom to remove any debris or other potential contaminants.
3. Superoxidize the pool with chlorine according to manufacturer’s instructions to clear the water.
4. Add a winter algaecide following manufacturer’s instructions.
Important: Do not use a winter algaecide with copper in it. This will void the DuoClear no-stain warranty.
5. Backwash the filter.
6. Drain part of the pool water. The amount to drain varies from one part of
the country to another. Consult your dealer for advice.
7. Remove the DuoClear cartridge and discard with household trash.
8 Winterize the pipes with pool antifreeze following manufacturer’s instructions.
9 Drain the water out of all equipment (pump, filter, etc.).
10 Store all baskets, hoses and cleaning equipment, indoors if possible.
11 Cover the pool with a winter cover.
Disposal
After six months of use, discard DuoClear cartridge in household trash. Do not save the cartridge for re-use. The cartridge is manufactured with the
mineral media sealed inside. In the unlikely event a cartridge breaks, remove it and vacuum out any media introduced into the pool.

ZODIAC POOL SYSTEMS, INC.
2620 Commerce Way
Vista, CA 92081
Tel: [phone]
Fax: [phone]
www.nature2.com
Nature2is a registered trademark of Zodiac Pool Systems, Inc.
©2008 Zodiac Pool Systems, Inc. All rights reserved.
TL-2501 12/08
Limited Warranty
DUOCLEAR™ LIMITED WARRANTY
The limited warranties contained within this document are the only warranties given with your DuoClear Cartridge and supercede any prior
warranties. All other warranties, expressed or implied, including the implied warranty of merchantability or the implied warranty of fitness for
a particular purpose are hereby disclaimed. Our sole obligation under this warranty, and the purchaser’s sole remedy, is limited to repair or
replacement of the DuoClear Cartridge. The DuoClear Cartridge warranty applies to the original owner only.
THE LIMITED WARRANTIES OF THE DUOCLEAR CARTRIDGE ARE:
DuoClear Cartridges are warranted to be free of defects in materials and to perform satisfactorily for a period of six months from the date
of purchase. DuoClear Cartridges are warranted not to cause copper staining in your pool. This limited warranty requires that you exercise
reasonable care of your pool and keep water in balance at all times and not use a copper-based algaecide. This limited warranty does not cover
discoloration to chromium fittings. This warranty does not cover cartridges used with any biguanide products such as Baquacil®or Soft Swim®or
any products containing bromine or bromine-based chemicals. If the cartridge is defective and does not perform satisfactorily for the entire six
months, we will make a prorated rebate based on your actual period of use. You are responsible to pay the below-indicated percentage on the
then applicable retail cost: < 1 month-0%; 1-2 months- 25%; 3-4 months-50%; 5-<6 months-75%.
EXCLUSIONS FROM WARRANTY
DuoClear Cartridges are designed for use on in-ground pools from 10,000 to 45,000 gallons, depending on cartridge model. If it is used in any
other application, the warranty is void, and the purchaser and/or pool owner releases the manufacturer from any and all claims related to the
use of the DuoClear Sanitizer.
This warranty does not cover problems arising in whole or in part from purchaser’s negligence, misuse or abuse, improper maintenance or
storage, accident, improper installation, improper application, failure to follow all appropriate safety precautions, Acts of God, abnormal
weather conditions, damage from plants or animals, and improper use of chemicals.
This warranty specifically excludes all incidental or consequential damages, except where state law requires them to be paid. This warranty gives
you specific rights. You may have other rights that vary from state to state.
TO SUBMIT A CLAIM
Report claims to Zodiac Pool Systems , Inc. by calling 1-800-822-7933. Only the original purchaser may submit a claim under this limited warranty. All claims must
be accompanied by an original purchase receipt.