Refurbished Water Quality Testing & Treatment — 23 Deals

23 open-box and refurbished Water Quality Testing & Treatment deals are live for shoppers in the US right now, with discounts averaging 21% off retail. Prices range from $7 to $217, and every listing shows the seller's condition grade, current price, savings versus list price and stock status — so you can compare before you buy. Top brands on sale include Fluval, Seachem, BaldrTherm and buccilly. Inventory syncs from Amazon and other partner stores throughout the day; open-box stock is usually one-of-a-kind, so the best deals sell out fast.

23 live US listings.

USA

Seachem

Seachem Pond Prime Water Conditioner - Chemical Remover and Detoxifier 1 L

$14⁷¹

kactoily Long-Range WiFi Aquarium Water Quality Monitor – 7 Parameter Digital Aquarium Water Tester for pH ORP EC TDS Salinity SG Temp, Freshwater & Saltwater Tanks

$216¹³

Activ Betta Bio-Activ Live Aqueous Solution – 1 Gallon – Instant Aquarium Cycling, Denitrifying Formula & Trace Elements for Betta Fish Tanks & Freshwater Aquariums

$17⁶³

Ecological Microbe Lift KH Bio-Active Booster, 8 lb.

Used – Mint

$29⁰³

$41.99

-31% Save $12.96

Update: 8 hours 16 mins

Buy at Amazon.com

USA

D&D

D-D RP-50 ROWAphos Phosphate Removal Media - 500 ml/16.9 oz

$20⁰⁰

Bio Foam Value Pack for Fluval 206/207 Canister Filters -10 Pack

$8⁶⁴

Seachem Flourish Iron 500ml

$15²⁴

BaldrTherm Digital Floating Pool Thermometer, Anti-Fog Design with 360° Visibility, IPX7 Waterproof Water Temp Monitor for Swimming Pools, Hot Tubs, Ice Baths, Spas, Aquariums & Ponds

$7¹⁸

Blue Life Reef Flux 7000MG

$29²¹

Seachem MultiTest Copper Test Kit

Used – Mint

$13⁴⁹

$17.99

-26% Save $4.50

Update: 13 hours 21 mins

Buy at Amazon.com

USA

LaMotte

Lamotte Green Program Low Cost Water Monitoring Kit, Adults

$43⁸³

Fluval - Media Maintenance Kit for AC110 Power Filter - for Use in Freshwater & Saltwater Aquariums

$22⁸⁶

LeoTube Aquarium Water Purification Tablets for Fish Tanks – Premium Water Purification Tablets to Remove All Kinds of Turbidity, Clarify Water, Promote Healthy Fish Environment (1)

$9²⁶

Fluval - Media Maintenance Kit for AC20 Power Filter - for Use in Freshwater & Saltwater Aquariums

$10²¹

Crystalpro Aqua Conditioner - Treats 5000 Gallons - Aquarium Water Conditioner - Neutralizes Chlorine and Ammonia 16.9 Oz

$13⁰⁶

Fluval - Ammonia Remover for AC70/AC110, 36.6 oz / 1038 g, 3-Pack

$14⁴⁷

Fluval - Media Maintenance Kit for AC50 Power Filter - for Use in Freshwater & Saltwater Aquariums

$10⁷²

Fluval Add-On Surface Skimmer – Compatible with AC20, AC30 & AC50 Power Filters – Removes Surface Film & Organic Waste – Improves Oxygen Exchange & Water Clarity – Easy Install, Safe for Fish

$7⁵²

API Betta Water, 64 OZ

$14⁴¹

Fritz Aquatics Maracyn Oxy True Fungal Infection Relief (16-Ounce)

$22⁹⁶

Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml

Used – Mint

$15⁷⁹

$16.62

-5% Save $0.83

Update: 13 hours 21 mins

Buy at Amazon.com

USA

Fluval

AC30 Power Filter, 10-30 US Gal / 38-114 L - Fluval USA (fluvalaquatics.com)

$42⁴⁹

2PCS Pure Cube Water Trough Filter-New,Eco-Aquarium Water Trough Purifier Cubes,Super Strong Filtration Activated Carbon Filter Media for Fish Tanks,Horse Troughs,Cattle,Ponds&Livestock Tanks Red

Used – VeryGood

$19⁹⁸

$19.98

Update: 20 hours 5 mins

Buy at Amazon.com

Water Quality Testing & Treatment open-box FAQ

How much can I save on open-box Water Quality Testing & Treatment?

Discounts on Water Quality Testing & Treatment at OpenBoxFox currently average 21% off retail across 23 live listings, with prices from $7 to $217. Savings are measured against the manufacturer's list price.

Are open-box and refurbished Water Quality Testing & Treatment safe to buy?

Yes — every listing shows the seller's condition grade (from open-box "Like New" to certified refurbished) before you buy. You purchase directly from the seller, such as Amazon, and that seller's standard return policy applies to your order.

Which Water Quality Testing & Treatment brands are on sale open-box right now?

The most-listed brands in Water Quality Testing & Treatment at the moment are Fluval, Seachem, BaldrTherm, buccilly and Blue Life. New open-box inventory arrives daily, so brand availability changes often.

How often are Water Quality Testing & Treatment deals updated?

OpenBoxFox syncs Water Quality Testing & Treatment inventory from partner stores throughout the day. Sold-out listings are removed automatically and new deals appear shortly after we find them.