Seachem Prime 100ML
Nearly all pet aquatics companies manufacture a product that removes chlorine. None of those, however, can compare in quality, concentration, or effectiveness to Seachem’s flagship product: Prime®. Prime® is the complete and concentrated conditioner for both fresh and saltwater. Prime® removes chlorine, chloramine and detoxifies ammonia, nitrite, and nitrate. It is non-acidic and will not impact pH. A further bonus for the reef hobbyist—Prime® will not over-activate skimmers.
Prime® is up to 5x more concentrated than competing products and is the second most concentrated dechlorinator on the market only after our own aquavitro®.
Prime® may be used during tank cycling to alleviate ammonia/nitrite toxicity. It contains a binder which reduces the toxicity of ammonia and nitrite, making it safer for fish and invertebrates during the initial stages of tank setup.
| Active Ingredients | Function |
|---|---|
| Chlorine and chloramine remover | Neutralizes harmful chlorine and chloramine compounds |
| Ammonia and nitrite detoxifier | Reduces toxicity of ammonia and nitrite in water |
| Non-acidic formula | Does not alter pH levels in aquarium water |
FAQ
Can Prime be used in both freshwater and saltwater aquariums?
Yes, Prime® is effective in both freshwater and saltwater aquariums.
Does Prime affect the pH of the water?
No, Prime® is non-acidic and will not impact pH levels.
Is Prime safe to use during tank cycling?
Yes, Prime® can be used during tank cycling to reduce ammonia and nitrite toxicity.

Vanessa Morrison –
I’ve used Prime for several months now in my reef tank. It effectively removes chlorine and chloramine, and I’ve noticed a significant drop in ammonia spikes during cycling. The water stays stable and my corals are thriving. No pH changes, which is a big relief.
Tracey Butler –
After switching from a cheaper dechlorinator, I saw a marked improvement in fish health. Prime works faster and lasts longer. I use it every time I add new water or during water changes.
Sean McLean –
It’s very effective at neutralizing chlorine and chloramine. The only thing I noticed is that it takes a bit more volume than expected for small tanks, but overall it’s reliable and safe.