Seachem - Sure Start 3-Pack | Beneficial Bacteria & Ammonia Detoxifier for Freshwater & Saltwater Aquariums

Cycle your tank fast, without the wait.

Seachem Sure Start combines two essential jobs in one bottle: it detoxifies ammonia, nitrite, and chloramine instantly, while seeding your tank with concentrated nitrifying bacteria to kick-start (or restart) the nitrogen cycle. Perfect for new tank setups, water changes, filter cleans, or anytime your bio-filtration takes a hit.

This 3-pack gives you enough Sure Start on hand for your initial setup plus follow-up dosing — ideal if you're cycling more than one tank, keeping a backup on the shelf, or running a larger system that needs repeated treatments.

Why aquarists reach for Sure Start:

• Detoxifies ammonia, nitrite, and chloramine on contact
• Seeds beneficial nitrifying bacteria to establish biological filtration faster
• Safe for use with fish already in the tank
• Ideal after water changes, filter media swaps, or medication use
• Works in both freshwater planted and non-planted setups

How to use: Shake well before use. Dose at setup and again 24–48 hours later for new tanks, or use after any event that disrupts your bio-filter (filter cleaning, antibiotic treatment, large water changes).

Note: For best cycling results, pair with regular ammonia/nitrite testing until your tank shows 0 ppm ammonia and nitrite.