How often do I add this to the tank to get it cycled? Is it an everyday thing, or once a week?

Every day, per the instructions.

Instructions say "turn off uv/ozone" before adding. i have fluorescent lighting in a freshwater tank. should i turn off the fluorescents?

The reason to shut off the UV is because the product contains specific bacteria. In our tanks, we do not shut off the fluorescent lights, only the UVHere is a link to their website http://www.seachem.com/Products/product_pages/Stability.htmlNan

Will having this shipped to a currently cold/freezing location destroy the beneficial bacteria?

It should not, the bacteria is in a dormant state wont wont really be living till you put it in your tank.

How much would I need to cycle two 5 gal tanks?

As much as you can afford. I add it periodically can my tank and been cycled for a couple months. Like with large water changes or introducing new fish.

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Description

🧬 Stabilize your aquarium ecosystem like a pro—because your fish deserve the best!

VERSATILE USE - Perfect for both freshwater and marine environments—one solution fits all.
TRUSTED BY EXPERTS - Endorsed by top aquarists and loved by thousands of satisfied users.
COMPACT CONCENTRATED - 100ml bottle packs a potent punch without cluttering your space.
RAPID AQUARIUM STARTUP - Kickstart your tank’s ecosystem with a powerful bacterial blend.
CONSISTENT WATER QUALITY - Maintains safe water parameters for happy, healthy fish.

Seachem Stability is a 100ml liquid bacterial supplement combining aerobic and anaerobic strains to rapidly establish and maintain a healthy aquarium environment. Suitable for both freshwater and saltwater tanks, it ensures stable water parameters, promoting vibrant, stress-free aquatic life. Trusted by aquarists worldwide, it’s a compact, allergen-free solution designed for all life stages and tank types.

Specifications

ASIN	B0002APIJ6
Allergen Information	Allergen-Free
Amazon Bestseller	#18,062 in Pet Supplies ( See Top 100 in Pet Supplies ) #255 in Aquarium Water Quality Testing & Treatment
Batteries Included	No
Customer Reviews	4.7 4.7 out of 5 stars (3,505)
Date First Available	August 9, 2012
External Testing Certification	Não aplicável
Flavor	Other
Is Discontinued By Manufacturer	No
Item Form	Liquid
Item model number	001062
Number of items	1
Pet Life Stage	All Life Stages
Pet Type	Tropical and Aquarium Fish
Size	100ml
Specific Uses	Indoor
Volume	100 Milliliters
batteries required	No

Reviews

B**I

Good product

Satisfied

9.06.2025

M**C

Healthy fish ~happy fish

I first heard about Seachem from Kev ~KaveMan Aquatics on Youtube. He suggested using with every water change for a healthy tank. The parameters stay in the safe zone for my aquarium. Highly recommend both Seachem and Kev for any fish folks who want a beautiful crystal clean tank.

21.07.2022

V**V

I think my fish love it

4.08.2025

Ü**N

gerçekten 1 hafta kullandım. akvaryum suyunu temizledi. neredeyse akvaryumu bozacaktım. pis bulanık su yüzünden. şu an bu vd metalin mavisi kullanarak su temizliğini sağladım.

27.11.2025

M**N

great for new tanks and adding new fish

11.10.2025

D**N

Ik adviseer een Dark Start van minimum 4 weken, en bij nieuwe filtermedia zeker Seachem Stability te gebruiken!

9.02.2024

S**D

Très bien ,au démarrage d un bac ,aide grandement

6.07.2025

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Stability for Freshwater and Saltwater 3.4 fl oz (100 ml)

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Common Questions