Refurbished Aquarium Water Treatments — 20 Deals

20 open-box and refurbished Aquarium Water Treatments deals are live for shoppers in the US right now, with discounts averaging 23% off retail. Prices range from $7 to $53, 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, API and DrTim's Aquatics. 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.

20 live US listings.

USA

Seachem

Betta Basics, 2 L / 67.6 fl. oz.

$17⁶¹

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

$17⁵²

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

$44⁹⁹

Seachem Flourish Iron 500ml

$9⁷⁷

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

$7⁰¹

Ultralife Blue Green Slime Stain Remover

$9⁸⁷

Seachem MultiTest Copper Test Kit

$13⁴⁹

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

$22⁵⁰

API Stress Zyme Freshwater and Saltwater Aquarium Cleaning Solution 1-Gallon Bottle

$52⁷⁵

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

$13¹⁷

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

$21³⁷

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

$12⁴⁶

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

$10²¹

Seachem Flourish Advance, 500 ml

$11⁸⁰

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

$10⁴²

API Betta Water, 64 OZ

$14⁰⁰

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

$7⁴¹

DrTim's Aquatics Ammonium Chloride Aquarium 100% Natural – 8 Oz. (Dr Tims Aquatics Ammonium Chloride | Saltwater Freshwater and Reef Aquariums, 100% Natural, 8 Oz)

$18⁹⁹

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

$15⁷⁹

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

Update: 7 days ago

Buy at Amazon.com

Aquarium Water Treatments open-box FAQ

How much can I save on open-box Aquarium Water Treatments?

Discounts on Aquarium Water Treatments at OpenBoxFox currently average 23% off retail across 20 live listings, with prices from $7 to $53. Savings are measured against the manufacturer's list price.

Are open-box and refurbished Aquarium Water Treatments 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 Aquarium Water Treatments brands are on sale open-box right now?

The most-listed brands in Aquarium Water Treatments at the moment are Fluval, Seachem, API, DrTim's Aquatics and Fritz Aquatics. New open-box inventory arrives daily, so brand availability changes often.

How often are Aquarium Water Treatments deals updated?

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

Shop more: Refurbished Pet Supplies · Refurbished Fish & Aquatic Pets · Refurbished Aquarium Accessories · Refurbished Water Quality Testing & Treatment