Fish Tank Water Conditioners & Aquarium Care | PetSmart

Keeping your pet fish’s tank in great shape involves using the right aquarium water care and conditioning products. In order to keep the water in your aquarium in great condition, you will occasionally need to purchase these products so your fish can live their best life. Pet parents can find the aquarium water care, aquarium water conditioner, and other aquarium supplies they need at PetSmart.

Our collection of aquarium water care and conditioner supplies includes products like:

Aquarium Water Conditioner
Pre-Conditioned Water
Aquarium Salt
Fish Tank Water Clarifier
Turtle Tank Water Cleaner
Algae Control
Ammonia Remover Pads
Bacteria Supplements
Fish Tank Dechlorinator
Fresh Water Starter Kits
Goldfish Minerals
And More

You are sure to find the exact fish tank water supplies you need at PetSmart. Need something else for your pet fish while you’re here? We sell fish disease treatment, fish food, fish feeders, fish tank plant care, fish pond care, saltwater aquarium care, fish tank water quality testers, and more.

PetSmart also offers convenient shopping with curbside or in-store pickup. Need something today? We have select items available for same-day delivery in most areas powered by DoorDash. For items you purchase frequently, PetSmart has Autoship that automatically delivers the items you want to your door as often as you’d like. Check the website to see what items are eligible.

Legit Script

Save 15% on your purchase of $50 or more on Same-Day Delivery for merchandise purchased on petsmart.com or the PetSmart app thru 6/19/25. Transaction total is prior to taxes and after discounts are applied. Same day delivery is available in most areas. Exclusions apply. Eligible products only. See product page to determine eligibility. Savings will automatically reflect in shopping cart with purchase of qualifying product. While delivery is contact-free, we recommend being home during the delivery window to bring perishable items inside right away. Prices & selection may vary in stores & online. While supplies last. Quantities may be limited. See www.petsmart.com/help or store associate for more details.

*For all offers listing a percent or dollar amount off regular price for individual products or categories of products: Eligible products only. Exclusions may apply. While supplies last. Quantities may be limited. Prices & selection may vary by store & online. Deliveries may be delayed. Offer may not be combinable with other promotions offers or discounts. Terms and conditions of an offer are subject to change at the sole discretion of PetSmart. See offer on site for end date. If the offer is a BUY/GET offer: Discount taken on lowest priced item(s) purchased. Mix and match not allowed between offers. Some offers require a minimum quantity purchase to receive discount. If the offer is a sitewide SPEND/GET offer: Transaction total is prior to taxes & shipping & after discounts are applied. Promo code may be required and should be entered upon checkout. See product page to determine eligibility and for complete offer details. If the offer is an EXTRA SAVINGS offer: Valid on select sale & online prices for merchandise. Enter promo code at checkout. See product page to determine eligibility and for complete offer details. For TREATS REWARDS offers: All bonus points offers must be activated in your Treats Rewards account prior to purchase. Must be signed in to your Treats Rewards account online or use membership ID in stores at checkout. See offer card in your Treats Rewards account for complete offer details.

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Terms & Conditions: Save 35% on your first Autoship order up to a maximum savings of $20.00 and 5% on recurring orders. Must be signed in to your Treats Rewards account to receive discount. Savings will automatically reflect in shopping cart with purchase of qualifying product and enrollment in Autoship. Exclusions apply. Eligible products only. See product page to determine eligibility. Not valid on services, gift cards, gift certificates, previous purchases & charitable donations. Offer may not be combinable with other promotional offers or discounts. Autoship terms and conditions apply. Treats Rewards members receive free shipping on select orders over $49.00, prior to taxes & after discounts are applied (additional terms apply). Prices & selection may vary. While supplies last. Quantities may be limited and deliveries may be delayed.

Terms & Conditions: Treats Rewards members enjoy Free Standard Shipping on select orders over $49. Must be signed into your Treats Rewards account prior to purchase. Transaction total is prior to taxes & after discounts are applied. Savings will automatically reflect in shopping cart with the purchase of qualifying merchandise. Valid only on orders shipped within the contiguous 48 U.S. states, military APO/FPO addresses and select areas throughout Canada. Offer not valid on all or select products in the following categories: live pets, canned, fresh or frozen foods, select cat litters. Terms and conditions of this offer are subject to change at the sole discretion of PetSmart. Delivery may be delayed due to acts beyond our reasonable control, which may include, but are not limited to, weather, strikes, power outages, shutdowns, local, provincial or federal governmental actions, and other similar acts. Delivery speeds will be delayed for orders that include Veterinary Authorized Food, Pharmacy, and Dropship items or to customer addresses such as Alaska, Hawaii, and Puerto Rico. Offer valid on PetSmart.com.

Terms & Conditions: Free Same-Day Delivery is available in most areas. Eligible products only. Exclusions apply. See product page to determine eligibility. While delivery is contact-free, we recommend being home during the delivery window to bring perishable items inside right away. Prices & selection may vary in stores & online. While supplies last. Quantities may be limited. See www.petsmart.com/help or store associate for more details.

Terms & Conditions: Curbside orders must be picked up two hours prior to store closing time. In store pickup available during all store hours. Orders must be placed two hours prior to pickup to receive same day. Store hours may vary. Check your local store for details & current store hours. Prices & selection may vary by store & online. While supplies last. Quantities may be limited. See www.petsmart.com/help or store associate for more details.