Seachem Prime 4 L — Ultra-concentrated aquarium water conditioner

Seachem Prime 4L is the professional size in the Prime range—the choice of breeders, fish rooms, aquarists managing multiple large systems, and specialty retailers. A single 4-liter container treats up to 80,000 liters of water at the standard dosage. It offers the best price per liter in the entire Prime range and is the most economical size in the long run.

Same ultra-concentrated formula as all other formats — no compromise on quality or effectiveness.

What Seachem Prime does for your aquarium

• Neutralizes chlorine instantly and completely
• Neutralizes chloramines permanently without releasing ammonia
• Detoxifies ammonia — converts toxic NH3 into non-toxic NH4+ without blocking nitrifying bacteria
• Detoxifies nitrites and nitrates — essential protection during cycling
• Removes heavy metals — copper, lead, zinc — found in Canadian tap water
• No impact on pH and biological filtration

The 4L Format — For Whom?

• Fish rooms and professional breeders — high weekly consumption
• Several large systems — main reef 500L+, refugium, quarantine tank
• Shops and pet stores — heavy daily use
• Aquarium clubs — economical group purchases
• Best price per litre in the entire Prime range

Dosage

• Routine: 5 mL per 200 litres with each water change
• Ammonia/nitrite emergency: 5 mL per 100 litres
• Practical tip: transfer a small amount into a 250 mL dosing bottle for more convenient daily use.

Prime Format Comparison

• 100 mL — treats 2000 L — ideal for nano and beginners
• 250 mL — treats 5,000 L — ideal for medium-sized aquariums
• 500 mL — treats 10,000 L — ideal for 100-300 L aquariums
• 1 L — treats 20,000 L — large aquarium
• 4 L — treats 80,000 L — best price per liter, professional use

Why buy Seachem Prime from ReefSolution?

• Authorized Seachem reseller in Canada since 1999 — guaranteed authentic product
• Always in stock — available in store in Laval and online
• Secure delivery across Canada — packaging suitable for large liquid formats
• Bilingual support — advice in French and English