Seachem Prime 250 mL — Ultra-concentrated aquarium water conditioner

Seachem Prime 250 mL is the ideal size for beginner aquarists or those maintaining a nano or medium-sized aquarium. It contains the same ultra-concentrated formula as the 500 mL size—the world's most widely used and recommended water conditioner—in a compact, easy-to-store, and economical format.

A 250 mL bottle of Seachem Prime treats up to 5,000 liters of water at the standard dosage of 5 mL per 200 liters. For a 100-liter aquarium with weekly 15% water changes, this size will last you several months.

What Seachem Prime does for your aquarium

Tap water used in Canada contains chlorine and chloramines that are toxic to your fish, corals, and nitrifying bacteria. Seachem Prime goes far beyond a simple chlorine remover:

• 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 — present in tap water
• No impact on pH and biological filtration

The 250 mL Format — For Whom?

• Nano aquariums from 20 to 100 liters — a size perfectly suited to actual consumption
• Beginners who want to try Prime before investing in a large format
• Aquarium enthusiasts with several small systems — quarantine, breeding, refugium
• Travel or emergency size — compact, easy to carry

Dosage

• Routine: 5 mL per 200 litres with each water change
• Ammonia/nitrite emergency: 5 mL per 100 litres
• Acclimation of new specimens: a few drops in the acclimation container

Why buy Seachem Prime from ReefSolution?

• Authorized Seachem reseller in Canada since 1999 — guaranteed authentic product
• Always in stock — Prime available anytime in-store and online
• Physical store in Laval, Quebec — come see us in person
• Secure delivery across Canada — liquid-friendly packaging
• Bilingual support — advice in French and English