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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Seachem Stability 100 ml, Establishes Biofilter & Prevents New Tank Syndrome In Freshwater And Marine Aquarium, White, 125, Stability 100ml

Product ID: 253593977

Details

Brand
Seachem
Item form
other
Liquid volume
100
Number of Packs
1
Unit count
100

⚡Rapid biofilter establishment

🌊Works in fresh & marine tanks

🧫Synergistic bacterial blend

¥2386

Duties & taxes included

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Description

🧬 Unlock your aquarium’s full potential with Stability—because your fish deserve the best!

TRUSTED PROVEN - Top-ranked with 4.7-star rating and thousands of happy aquarists worldwide.
BIOFILTER BOOSTER - Rapidly establishes a robust biofilter to prevent new tank syndrome.
TANK SAFE FORMULA - Non-toxic to fish, plants, and aquatic life—safe even if overdosed.
RESILIENT PERFORMANCE - Effective across wide temperature, pH, and organic load ranges—never crashes.
BROAD SPECTRUM BACTERIA - Contains aerobic, anaerobic, and facultative strains for comprehensive waste breakdown.

Seachem Stability 100 ml is a scientifically formulated aquarium conditioner that rapidly establishes a stable biofilter in both freshwater and marine tanks. Its unique blend of aerobic, anaerobic, and facultative bacteria safely breaks down harmful waste compounds, preventing new tank syndrome and ensuring a healthy aquatic environment. With broad tolerance to environmental conditions and complete safety for all aquatic life, Stability is a must-have for any serious aquarist aiming for a thriving tank.

Specifications

ASIN	B0002APIJ6
Allergen Information	BPA-Free
Best Sellers Rank	#465 in Pet Supplies ( See Top 100 in Pet Supplies ) #2 in Aquarium Water Quality Testing & Treatment
Brand Name	Seachem
Country of Publication	USA
Customer Reviews	4.7 4.7 out of 5 stars (4,876)
Global Trade Identification Number	00000116012508
Item Form	other
Item Type Name	Aquarium Conditioner
Liquid Volume	100 Milliliters
Manufacturer	Seachem
Manufacturer Part Number	075179
Model Number	001062
Number of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	000116012508 000116008211
Unit Count	100 Milliliters

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