Tank Starter 2

Tank Starter 2 is your targeted nitrogen source for the controlled start-up of saltwater or freshwater aquariums. The solution contains pure ammonium chloride and was specially developed for use with starter bacteria such as our Tank Starter 1 (for reef tanks). The simulated ammonium load creates a realistic environment in which nitrifying bacteria can develop in a targeted manner – without the need for fish stock, food, or unnecessary risks.

Perfect for:

• New aquariums (controlled start-up)
• Quarantine tanks
• Fish-only systems
• Aquarists who want maximum control over nitrogen dynamics

Why ammonium chloride?

The targeted use of ammonium chloride mimics the natural nitrogen input through uneaten food and excretions – without endangering real animals. This allows the start-up phase to be safely simulated and monitored. An ideal tool for aquarists who prefer a well-thought-out, clean start – without the uncertainty of traditional methods.

What happens chemically?

During the initial run, ammonium chloride is used to deliberately introduce ammonium (NH₄⁺) into the system. The starter bacteria (e.g., from tank starter 1) first convert this into nitrite (NO₂⁻) and then into nitrate (NO₃⁻) – the goal is a stable, closed nitrogen cycle.

Step-by-step instructions for reef tanks

Day 1:

• Start with an ammonium concentration of approximately 4 mg/l (→ 4 ml of Tank Starter 2 per 100 l of water)
• Add Tank Starter 1 at the same time (double dosage recommended)

Days 2–5:

• Measure ammonium daily
• As soon as the level drops, also measure nitrite

Days 5–10:

• If nitrite is visible, also measure nitrate
• If nitrate is rising, biological degradation is taking place

Days 10–21:

• Monitor levels, add more ammonium if necessary
• If ammonium and nitrite are undetectable for 3 consecutive days: The aquarium is safe to stock!

Benefits at a Glance

• Controlled, safe cycling phase
• No animals or food required
• Reduced risk of algal infestation
• Fast and targeted build-up of bacterial populations
• Can be combined with Tank Starter 1 for saltwater aquariums
• Particularly helpful for modern aquarium setups

Contents: 50 ml ammonium chloride solution
Dosage: 1 ml per 100 liters increases ammonium concentration by 1 mg/l

Step-by-step video instructions