Skip to site navigation Skip to main content
main content
  1. Home
  2. Marketplace
  3. Pets & animals
  4. Fish
  5. Water treatment

Water treatment

Search Results

Showing 1,122 results

Card display mode (optional)
Advertisement
Advertisement
Advertisement
Advertisement
Auckland
Closes: Tue, 6 May
Bottle Chlorine Test Drops, for testing of clear liquids.

$12.00 shipping nationwide

Expected delivery in 3-4 business days

Buy Now
$24.99
Loading Image 1 of 2
Image 1 of 2
Loading Image 2 of 2
Auckland
Closes: Tue, 6 May
Bottle pH Test Drops, pH reagent for testing pH of clear liquids.

$12.00 shipping nationwide

Expected delivery in 3-4 business days

Buy Now
$16.99
Loading Image 1 of 2
Image 1 of 2
Loading Image 2 of 2
Canterbury
Closes: Tue, 6 May
API Pond Algaefix 237ml - Pond Algae Control

Shipping from $9.00

No reserve
$29.90
Buy Now
$29.90
Loading Image 1 of 1
Image 1 of 1
Other
Closes: Sat, 10 May
PRO4-DJ Aquarium Reverse Osmosis Membrane Filter Purifier RO DI Water Filters

Free shipping

Buy Now
$298.43
Loading Image 1 of 20
Image 1 of 20
Loading Image 2 of 20
Loading Image 20 of 20
Other
Closes: Sat, 10 May
PRO5-DJ Aquarium Reverse Osmosis Membrane Filter Purifier RO DI Water Filters

Free shipping

Buy Now
$441.77
Loading Image 1 of 20
Image 1 of 20
Loading Image 2 of 20
Loading Image 20 of 20
Auckland
Closes: Sun, 11 May
Aquis 1200 Canister Filter
Reserve met
$50.00
Loading Image 1 of 2
Image 1 of 2
Loading Image 2 of 2
Wellington
Closes: 39 mins
Filter media for all canister filters

Shipping from $7.00

Buy Now
$39.00
Loading Image 1 of 1
Image 1 of 1
Manawatu
Closes: Wed, 7 May
Crushed Glass for Water Filter 5kg

Shipping from $16.30

Buy Now
$15.00
Loading Image 1 of 2
Image 1 of 2
Loading Image 2 of 2
Auckland
Closes: Tue, 6 May
Dual Test Pack Bottle pH & Chlorine Testing drops for clear liquids.

$12.00 shipping nationwide

Expected delivery in 3-4 business days

Buy Now
$39.99
Other
Closes: Wed, 7 May
Fish tank water purification agent for ornamental fish 260ML

Free shipping nationwide

Expected delivery in 5-8 business days

Buy Now
$28.61
International
Closes: Sun, 11 May
1PCS Aquarium Fish Tank Carbon Dioxide CO2 Monitor Glass Drop Ball Checker
NZ Customer Support, 50000+ Positive Feedbacks

$3.99 shipping nationwide

Expected delivery in 8-15 business days

Buy Now
$14.55
$11.95
Save 18%
Auckland
Closes: Sun, 11 May
Tap Water Conditioner API - 472ml
SALE! WAS $33.95 NOW $27.16 ENDS 8/5/25

Shipping from $6.00

Buy Now
$33.95
$27.16
Save 20%
Auckland
Closes: Sun, 11 May
Aquatic API Pond Algaefix (1.89L)
SALE! WAS $183.00 NOW $164.70 ENDS 8/5/25

Free shipping nationwide

Expected delivery in 3-5 business days

Buy Now
$183.00
$164.70
Save 10%
Auckland
Closes: Sun, 11 May
Reef Plus 250mL - Seachem
SALE! WAS $31.95 NOW $28.76 ENDS 8/5/25

Shipping from $6.00

Buy Now
$31.95
$28.76
Save 10%
International
Closes: Sun, 11 May
Fish Tank CO2 Diffuse Glass Drop Checker For Co2 Monitor Glass Drop Checker PH
NZ Customer Support, 50000+ Positive Feedbacks

$3.99 shipping nationwide

Expected delivery in 8-15 business days

Options available
Buy Now
$13.95–$15.95
Save 18%
Auckland
Closes: Sun, 11 May
PH Test Strips

$6.81 shipping nationwide

Expected delivery in 2-3 business days

Buy Now
$4.06
Auckland
Closes: Sun, 11 May
Flourish Iron 500mL - Seachem
SALE! WAS $42.95 NOW $38.66 ENDS 8/5/25

Shipping from $6.00

Buy Now
$42.95
$38.66
Save 10%
Auckland
Closes: Sun, 11 May
6 in 1 Aquarium Test Strips, 50 Strips Fish Tank Water Quality Test Kit
50 Strips Fish Tank Water

Shipping from $8.34

Buy Now
$21.36
$14.95
Save 30%
Auckland
Closes: Sun, 11 May
6 in 1 Aquarium Test Strips, 50 Strips Fish Tank Water Quality Test Kit
50 Strips Fish Tank Water

Free shipping

No reserve
$23.90
Buy Now
$24.90
Waikato
Closes: Sun, 11 May
Aqua One Water Conditioner Health + 2L

Shipping from $15.00

Buy Now
$26.00
Waikato
Closes: Sun, 11 May
Ammo-Carb 567g

Shipping from $9.50

Buy Now
$10.00
Waikato
Closes: Sun, 11 May
Aqua One Sponge - H100 ClearView (2pk)

Shipping from $5.00

Buy Now
$5.00
Waikato
Closes: Sun, 11 May
Aqua One Cartridge Carbon - H100 ClearView (2pk)

Shipping from $5.00

Buy Now
$9.80
Waikato
Closes: Sun, 11 May
Pond One Pond Algae Blocks 20g

Shipping from $6.00

Buy Now
$5.50
Waikato
Closes: Sun, 11 May
Aqua One Algae Block 20g

Shipping from $6.00

Buy Now
$5.00
Auckland
Closes: Tue, 6 May
Seachem Flourish Glue 2x4g

Free shipping nationwide

Expected delivery in 3-4 business days

Buy Now
$30.99
Auckland
Closes: Sun, 11 May
Reef Advantage Magnesium (1.2kg)
SALE! WAS $62.95 NOW $56.66 ENDS 8/5/25

Shipping from $6.00

Buy Now
$62.95
$56.66
Save 10%
International
Closes: Sun, 11 May
Aquarium Fish Tank CO2 Diffuser Glass Cup Carbon Dioxide Reactor With Ceramic
NZ Customer Support, 50000+ Positive Feedbacks

$3.99 shipping nationwide

Expected delivery in 8-15 business days

Buy Now
$16.99
$13.95
Save 18%
Auckland
Closes: Tue, 6 May
API pH Down 37ml

Shipping from $2.00

No reserve
$12.99
Buy Now
$12.99
Auckland
Closes: Tue, 6 May
API Algaefix - 237ml

Shipping from $7.20

No reserve
$39.99
Buy Now
$39.99
Auckland
Closes: Tue, 6 May
Ehfisubstrat Pro 250mL

Shipping from $7.20

No reserve
$30.95
Buy Now
$30.95
Auckland
Closes: Tue, 6 May
API Accu-clear 118ml

Shipping from $7.20

Buy Now
$19.95
Auckland
Closes: Tue, 6 May
Seachem Multitest - Nitrite & Nitrate

Shipping from $7.20

Buy Now
$43.90
Auckland
Closes: Tue, 6 May
50% OFF! Korallen-Zucht Pohl`s B-Balance Concentrate 500ML, Only $41.5 Now

Shipping from $8.00

Buy Now
$41.50
Auckland
Closes: Tue, 6 May
Seachem Reef Carbonate 250ml

Shipping from $7.20

Buy Now
$15.97
Nelson Bays
Closes: Sun, 11 May
Seachem Flourish Potassium

Shipping from $3.00

Buy Now
$19.90
Auckland
Closes: Tue, 6 May
API Stress Coat Water Conditioner 237ml

$6.95 shipping nationwide

Expected delivery in 2-3 business days

Buy Now
$22.99
Auckland
Closes: Tue, 6 May
Seachem Reef strontium 500ml

$7.20 shipping nationwide

Expected delivery in 5-6 business days

Buy Now
$38.31
Auckland
Closes: Tue, 6 May
Seachem Nourish 100ml!!

Shipping from $7.20

Buy Now
$28.99
Auckland
Closes: Tue, 6 May
50% OFF! Seachem Reef trace 250ml, Only $ 15.98 Now

Shipping from $7.20

Buy Now
$15.98
Auckland
Closes: Tue, 6 May
Aqua One Water Conditioner Health 250ml

Shipping from $6.80

Buy Now
$15.99
Auckland
Closes: Tue, 6 May
Clearance!! $10.00TLC for Saltwater Aquariums 375ml !!

Shipping from $2.00

No reserve
$10.00
Buy Now
$10.00
Auckland
Closes: Tue, 6 May
50% off expired Flourish 100mL

Shipping from $2.00

No reserve
$8.99
Buy Now
$8.99
Auckland
Closes: Tue, 6 May
Clearance Sale 50% OFF !! Aquavitro eight.four 350ml!!

Shipping from $2.00

No reserve
$16.45
Buy Now
$16.45
Auckland
Closes: Tue, 6 May
API Algaefix 473 ML

Shipping from $2.00

No reserve
$62.99
Buy Now
$62.99
Auckland
Closes: Tue, 6 May
Seachem Stability 500ml

Shipping from $2.00

No reserve
$59.99
Buy Now
$59.99
Auckland
Closes: Tue, 6 May
API Tap Water Conditioner 118ml

Shipping from $2.00

No reserve
$17.99
Buy Now
$17.99
Auckland
Closes: Tue, 6 May
API Stress Coat 118ml

Shipping from $2.00

No reserve
$14.99
Buy Now
$14.99
Auckland
Closes: Sun, 11 May
Fish Net - Seachem (8.5cm)
SALE! WAS $5.95 NOW $5.36 ENDS 8/5/25

Shipping from $6.00

Buy Now
$5.95
$5.36
Save 10%
Auckland
Closes: Sun, 11 May
API Pond-Zyme Sludge Destroyer 227g
SALE! WAS $69.95 NOW $62.96 ENDS 8/5/25

Shipping from $6.00

Buy Now
$69.95
$62.96
Save 10%
International
Closes: Sun, 11 May
3 In 1 TDS Water Tester TDS EC Temperature Water Meter 0-9999 ppm Accur
Options available
Buy Now
$19.09
Auckland
Closes: Sun, 11 May
Aquatic Reef Advantage Calcium (4kg)
SALE! WAS $407.00 NOW $345.95 ENDS 8/5/25

Free shipping nationwide

Expected delivery in 3-5 business days

Buy Now
$407.00
$345.95
Save 15%
International
Closes: Sun, 11 May
Aquarium Gravel Cleaner, New Quick Water Changer With Air-pressing

$5.75 shipping nationwide

Expected delivery in 10-13 business days

Buy Now
$33.38
International
Closes: Sun, 11 May
ZRDR CO2 Atomizer External Super Diffuser Reactor For Aquarium
NZ Customer Support, 50000+ Positive Feedbacks

$3.99 shipping nationwide

Expected delivery in 8-15 business days

Buy Now
$36.46
$29.95
Save 18%
Auckland
Closes: Sun, 11 May
Ph Kit High Range Fresh-Salt API
SALE! WAS $26.95 NOW $24.26 ENDS 8/5/25

Shipping from $6.00

Buy Now
$26.95
$24.26
Save 10%
Hawke's Bay
Closes: Sun, 11 May
Sera CO2 Tablets

$7.99 shipping nationwide

Expected delivery in 1-2 business days

Buy Now
$21.99
International
Closes: Sun, 11 May
14 IN 1 PH Water Test Strips, Water Quality Test for Well Water and Tap
Buy Now
$27.36
Nelson Bays
Closes: Sun, 11 May
Seachem Acid Buffer

Shipping from $3.00

Options available
Buy Now
$10.90–$34.90
Auckland
Closes: Sun, 11 May
Malachite Green 0.4% -1L - (Wunder) Aquatic Medication
SALE! WAS $142.00 NOW $127.80 ENDS 8/5/25

Free shipping nationwide

Expected delivery in 3-5 business days

Buy Now
$142.00
$127.80
Save 10%
We are upgrading some of our systems
Learn more