Seachem Prime 50ml
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 | Chlorine, chloramine, ammonia, nitrite, nitrate |
|---|---|
| Form | Liquid |
| Volume | 50ml |
| Usage | Removes chlorine and chloramine; detoxifies ammonia, nitrite, and nitrate in both freshwater and saltwater systems |
FAQ
Can Prime be used in both freshwater and saltwater tanks?
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.
Can Prime be used during tank cycling?
Yes, Prime® can be used during tank cycling to reduce ammonia and nitrite toxicity.

Joseph Dickens –
I’ve used Prime for several months in my reef tank. It effectively removes chlorine and chloramine, and I 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 plus.
Blake Rutherford –
After switching from a cheaper dechlorinator, I found Prime to be much more reliable. It works faster and doesn’t cause any skimmer issues. My fish have been healthy since I started using it regularly.
Joshua Russell –
Good product, works well for removing chlorine. A bit expensive, but the effectiveness is worth it. I use it every time I add new water to my tank.
Anne Wilson –
Used Prime during tank setup and it made a huge difference in reducing nitrite levels. My shrimp survived the first few days without stress. Highly recommend for new tank owners.