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Seachem Prime
Price range: $5.95 through $169.95
Prime® is Seachem’s flagship water conditioner and the gold standard in dechlorination for both freshwater and saltwater aquariums. Highly concentrated and incredibly effective, Prime® removes chlorine and chloramine while simultaneously detoxifying ammonia, nitrite, and nitrate. It is non-acidic, will not affect pH, and won’t over-activate protein skimmers, making it a reliable choice for reef hobbyists too. Up to 5 times more concentrated than competing products, a little goes a very long way.
Key Features & Benefits
- Removes chlorine and chloramine from tap water instantly
- Detoxifies ammonia, nitrite, nitrate, and heavy metals
- Up to 5x more concentrated than most competing dechlorinators
- Non-acidic formula that will not affect pH
- Safe for use in freshwater and saltwater aquariums
- Will not over-activate protein skimmers in reef tanks
- Suitable for use during tank cycling to reduce ammonia and nitrite toxicity
Specifications
| Specification | Details |
|---|---|
| Standard Dosage | 1 capful (5 mL) per 200 L of new water |
| High Chloramine Dosage | Double dose (10 mL per 200 L) is safe to use |
| Emergency Nitrite Dosage | Up to 5x normal dose (25 mL per 200 L) |
| High Temperature Dosage | Half dose if water is above 30°C and chlorine or ammonia levels are low |
| Sizes Available | 50 mL, 100 mL, 250 mL, 500 mL, 1 L, 2 L, 4 L |
| Suitable For | Freshwater and saltwater aquariums |
| Best Used With | Seachem Stability® |
The Science
Most water conditioners simply remove chlorine and stop there. Prime® goes further by binding ammonia, nitrite, and nitrate into a non-toxic form that your biofilter can still process and remove naturally. This makes it particularly valuable during tank cycling, when ammonia and nitrite spikes are common and can quickly become dangerous for fish.
Prime® also neutralises heavy metals found in tap water at typical concentration levels, providing an added layer of protection with every dose. Each cap thread measures approximately 1 mL, making it easy to measure accurate smaller doses for compact tanks or top-ups. The sulphur odour you may notice when opening the bottle is completely normal and is no cause for concern.
Advice
Use 1 capful (5 mL) per 200 L of new water at every water change or when setting up a new tank. Prime® can be added directly to the aquarium, but works best when added to new water before it enters the tank. For exceptionally high chloramine levels, a double dose is safe. In a nitrite emergency, up to 5 times the normal dose can be used. If water temperature exceeds 30°C and chlorine or ammonia levels are low, reduce to a half dose. When introducing new fish to an established tank, use it alongside Seachem Stability®.
Heads-up
The sulphur smell when opening Prime® is normal and does not indicate a problem with the product. While Prime® detoxifies ammonia and nitrite, it is not a substitute for a functioning biofilter or regular water changes. For ongoing biological filtration support, use Seachem Stability® alongside Prime® as part of your regular maintenance routine.
Contact Us
Not sure what else you might need for a new setup? Contact our team for personalised advice tailored to your aquarium.
| Size | 50ml, 100ml, 250ml, 500ml, 1L, 2L, 4L |
|---|
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