
Very Important! Before using
cartridges, establish an initial residual
of 0.5 - 1.0 ppm free chlorine with
FROG®Jump Start®(EPA Reg. No.:
53735-12) start-up shock, included
in this package, that quickly dissolves
with an effervescent fizzing action – one packet per 600 gallons.
4.
Step 1: Prepare the Hot Tub
• Check water balance. pH and
Total Alkalinity need to be in
the proper ranges for the FROG
Serene In-Line System to work
correctly.
• Check FROG Serene Bromine
Cartridge and replace if empty—
see instructions under “Put the
System to Work”.
• Remove the FROG Serene
Bromine Cartridge from the In-Line
System until the bromine level is
down to 2.0 ppm.
• Lower the FROG Serene Bromine
Cartridge setting by 1 number and
replace cartridge in the In-Line
System.
• Test in 24 hours. Repeat process
until bromine level stays within 1.0
to 2.0 ppm.
Step 2: Set the Cartridges
Step 3: Put the System to Work
Step 4: Routine Hot Tub Care
Troubleshooting
Manufactured by: King Technology, Inc.
530 11th Ave S, Hopkins, MN 55343 U.S.A.
952-933-6118 • Customer Service 800-222-0169
frogproducts.com
• Cloudy Water or Low-Bromine Levels • High Bromine Levels
Made in U.S.A. Patents: kingtechnology.com/IP
EPA Est. No.: 071209-AZ-001
E083018553091843R4N 20-48-0187
Remove holder by pushing down
and turning counter clockwise
before pulling out.
Replace blue Mineral Cartridge every four months.
• Discard it in the trash even if it appears to have media left inside.
• Don’t attempt to reuse: the minerals are spent after 4 months.
Replace green Bromine Cartridge when empty.
• Life of cartridge varies depending on hot tub size and number
of users.
• Drain water from cartridge to ensure it is empty.
• Discard in trash or offer for recycling if available.
Set the blue FROG Serene Mineral
Cartridge to #6 (hold the bottom and
turn the top until 6 appears in the win-
dow). No further adjustments are nec-
essary for the life of the cartridge.
The In-Line System is made up of:
(A) a cap that is easily distinguish-
able among the ttings on the top
of the hot tub
(B) a cartridge holder that pulls out
of the system
(C) a FROG Serene Mineral
Cartridge that helps control
bacteria in the water
(D) a FROG Serene Bromine
Cartridge that helps support the
minerals while oxidizing contami-
nants like body oils and ammonia
compounds responsible for smelly
chloramines. The cartridges are
adjustable to meet your specic
hot tub water care needs.
C.
FROG
Serene
Mineral
Cartridge
Water
Flow
A. Cap
B.
Cartridge
Holder
D.
FROG
Serene
Bromine
Cartridge
3.
Heat water to the manufacturer’s recommended
temperature.
5.
Water Balance Guidelines
pH: 7.2 – 7.8
Total Alkalinity: 80 - 120 ppm
Calcium Hardness: 150 - 250 ppm
Total Dissolved Solids: <1500
IMPORTANT: Always follow printed instructions on the balancing
chemical packages. Add balancing chemicals in small increments one at a
time with the jets on and wait 6 hours before testing again and adding any
additional balancing chemicals.
b. Look at the Total Alkalinity reading first. Adjustments
should be made to bring the Total Alkalinity in the range of
80 – 120 ppm prior to making any adjustments to pH even if
it throws pH off further.
a. Take a water sample from the hot
tub and dip a FROG®Test Strip into it.
Balance water by following STEPS a — d in order.
c. After Total Alkalinity is in range, test for pH. It should be
between 7.2 and 7.8. If higher or lower, add a pH adjuster.
d. Lastly test for Calcium Hardness. It should be between
150 and 250 ppm. If higher, partially drain the hot tub (about 6 inch-
es) and fill with water low in calcium. If lower, add Calcium Increaser.
If balancing takes longer than 2 days, shock the water and
maintain a chlorine level while continuing balancing.
Fill hot tub with fresh water.
Metal
Out
If using source water that is high in
iron or other metals, see your dealer
before filling the hot tub. It may
require the use of a metal control
product.
Cleaner
because it kills bacteria two ways
Clearer
because it helps keep pH balanced
Softer
because there’s up to 50%* less bromine
Easier
with pre-lled cartridges for no mess, or measuring
Clean or replace filter cartridges
when dirty.
(Follow manufacturer’s instructions).
1.
2.
Slowly insert holder into system (see
diagrams). Line up holder arrow-(1)
with system arrow-(2). Push down until
holder tabs-(3) go past system tabs-(4)
and turn holder to the right (clockwise)
until it stops. To ensure a locked
position, attempt to pull holder up.
If it stays in place, the lock is secure.
-System
Arrow
3-Holder
Tab
1-Holder
Arrow
4-System
Tab
Replace
Cap
Snap the FROG Serene Mineral
Cartridge into the area marked
“Minerals” (top portion) and the
FROG Serene Bromine Cartridge
into the area marked “Bromine
or SmartChlor” (bottom portion)
making sure to line up the inden-
tation at the top of the cartridges
with the raised area on the holder.
DO NOT OPEN CAP WHILE JETS
ARE ON.
3.
4.
5.
1.
Replacing Cartridges
2.
Open cap of In-Line System and
set aside.
BRAND
Lubricate in-line holder o-ring twice a year with a silicone
lubricant.
Shock the hot tub once a week or as
needed with a non-chlorine shock.
Heavily used hot tubs may require
more frequent shocking.
1. Drain and refill hot tub as direct-
ed by your hot tub manufacturer
or every four months when FROG
minerals need to be replaced.
2.
3.
6.
7.
Run filtration system as the
manufacturer recommends
to maintain proper water flow
through the In-Line System.
Regularly test water with FROG
Test Strips and follow directions
in Step 1 for maintaining pH,
Total Alkalinity and Calcium
Hardness.
NOTE: pH is affected by bather load, chemicals used, evapo-
ration and the make-up of your source water so maintaining
water balance regularly is important.
Replace mineral and bromine cartridges
as directed in Step 3: Put the System to
Work.
Cut-away view of cartridges
snapped into holder and
placed into the In-Line
System.
Set the green FROG Serene Bromine
Cartridge to the setting that match-
es your hot tub size in gallons.
For one week test the water daily
with FROG Test Strips and adjust
cartridge up or down by 1 setting
per day until the color on the test
strip matches the ideal FROG bromine
range of 1.0 to 2.0 ppm.
Register your
FROG Serene System at
frogproducts.com
Learn more at frogproducts.com or call 800.222.0169
* Compared to the minimum ANSI recommended bromine level of 2.0 in a
residential hot tub.
FROG Serene Mineral Cartridge
(Blue)
FROG Serene Bromine Cartridge
(Green)
5.
4. Maintain at least a 1.0 ppm bromine level at all times.
Note: Bromine levels are reduced up to 50%* when
using FROG minerals.
2
System Setting Chart
200 Gallons 0
250 Gallons 1
300 Gallons 1
350 Gallons 2
400 Gallons 3
450 Gallons 4
500 Gallons 5
550 Gallons 5
600 Gallons 6
Minerals
NOTE: Using
the bromine
cartridge in
the area
marked
“Minerals”
can cause over
bromination
which shortens
cartridge life.
Indent on
cartridges
Raised
area inside
holder,
one for
each
cartridge
®
®In-Line System
Operating
Instructions
SETTING
WINDOW
• Make sure your FROG Serene Mineral Cartridge is not older
than 4 months as it will be ineffective and more bromine will be
required to maintain the hot tub until you replace the minerals.
• Shock the hot tub with a non-chlorine shock to regain
clarity.