Search  for anything...
Seachem

Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml

  • Based on 33,627 reviews
Condition: New
Checking for the best price...
$16.69 Why this price?
New Year Deal · 22% off was $21.40

Buy Now, Pay Later

As low as $4 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE refund/replacement until Jan 31, 2026

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Jan 12
Order within 11 hours and 53 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: 500 mL


Style: Conditioner


Features

  • POWERFUL TREATMENT: Seachem Prime is a complete and concentrated conditioner for both freshwater and saltwater fish tanks, working hard to remove chlorine and chloramine.
  • REMOVER: Seachem Prime immediately and permanently removes chlorine and chloramine, successfully allowing the bio filter to remove ammonia, nitrite, and nitrate while they are detoxified for 48 hours.
  • DETOXIFIER: Seachem Prime effectively detoxifies ammonia, nitrite, and heavy metals found in the tap water at typical concentration levels, providing a ideal environment for your betta, tetra, or other fish.
  • USE: Use 1 capful (5 mL) of Seachem Prime for each 200 L (50 US gallons) of new or replacement water. For best results, add Seachem Prime to new water first. For exceptionally high chloramine concentrations, a double dose may be used safely. For smaller volumes, use 2 drops per gallon.
  • SAFETY: In case of an emergency, the 5x dose of Seachem Prime may be used for both ammonia and nitrite. Use a 12 dose if the water temperature is > 30C (86F) and chlorine or ammonia levels are low.

Description

Seachem Prime is a complete and concentrated conditioner for both freshwater and saltwater fish tanks, working hard to remove chlorine and chloramine. For over three decades, Seachem has been a company rooted in sound science. Our experience in the hobby and an educated staff of chemists and biologists are part of the package when you purchase Seachem products. Seachem remains as one of the few surviving independent and privately owned pet care companies. Seachem is owned and operated by hobbyists. All of our employees are hobbyists who maintain aquariums at home and at the office. Seachem itself was started because one such passionate hobbyist - Dr. Leo G. Morin (Founder) - recognized that the available solutions to aquarists problem wanting. This resulted in Seachem’s very first product: Cupraplex (today known as Cupramine). Over thirty years later Seachem is still approaching old problems in a new way. Seachem’s philosophy is that the knowledgeable hobbyist makes the best customer. This is reflected in solid and reliable customer education and support as well as products proven in science and performance. While Seachem has grown rapidly into a national and international firm, it retains the culture of a small company and is readily available to its customers.

Brand: Seachem


Liquid Volume: 500 Milliliters


Item Weight: 9.92 ounces


Item Form: Liquid


Manufacturer: Seachem Laboratories, Inc.


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 6.6 x 2.5 x 2.3 inches; 9.92 ounces


Item model number ‏ : ‎ 67104330


Department ‏ : ‎ men, women


Date First Available ‏ : ‎ June 20, 2004


Manufacturer ‏ : ‎ Seachem Laboratories, Inc.


Best Sellers Rank: #714 in Pet Supplies (See Top 100 in Pet Supplies) #1 in Aquarium Water Treatments


#1 in Aquarium Water Treatments:


Customer Reviews: 4.8 4.8 out of 5 stars (41,071)


Item Weight: 9.9 ounces


Department: men, women


Manufacturer: Seachem Laboratories, Inc.


Item model number: 67104330


Date First Available: June 20, 2004


Item Package Dimensions L x W x H: 7.56 x 2.32 x 2.28 inches


Item Dimensions LxWxH: 6.6 x 2.5 x 2.3 inches


Item Weight: 9.92 ounces


Brand Name: Seachem


Target Audience Keyword: fish


Directions: Prime is the complete and concentrated conditioner for both fresh and salt water. Prime removes chlorine, chloramine and ammonia. Prime converts ammonia into a safe, non-toxic form that is readily removed by the tank's biofilter. Prime may be used during tank cycling to alleviate ammonia/nitrite toxicity. Prime detoxifies nitrite and nitrate, allowing the biofilter to more efficiently remove them. Prime also promotes the production and regeneration of the natural slime coat. Prime is non-acidic and will not impact pH. Prime will not overactivate skimmers. Use at start-up and whenever adding or replacing water. As part of their ongoing environmental stewardship efforts Seachem will donate a portion of the profits for every specially labeled edition bottle of Prime, Stability, Pristine, and Clarity (in Bonus Sizes of 325 mL -- 30% more) sold to a Rhino preserve in South Africa.


Country of Origin: United States


Warranty Description: 2 year manufacturer


Model Name: 075220


Size: 500 mL


Material: Plastic


Age Range Description: All Life Stages


Number of Items: 1


Style: Conditioner


Included Components: Toys, Fetch Tug and Toss Toys, Pet-Toy-Balls


Specific Uses for Product: Active


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jan 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Works wonders
Size: 500 mL Style: Conditioner
Review Image by Cory Cory
Doing an emergency fish in cycle for my tank and this stuff is amazing. Can get me through the trials of being a new fish owner and keep him safe till healthy bacteria is established in my tank. Performing Emergency fish-in cycle with Seachem Prime Step 1: Set up your aquarium It’s time to set up your aquarium. And, that includes all the equipment – heaters, filters, air pumps… Get it in there! Don’t forget to rinse it with fresh water first! The beneficial bacteria need a surface to cling to, namely your substrate and filter media. So by setting everything up, you give your bacteria as many surfaces as possible to cling to. Add water to the tank, and don’t forget to dechlorinate it with your water conditioner first. Finally, you want to keep all electrical equipment, such as heaters, filters and bubblers, switched on throughout the entire cycling process. Not only will this keep your fish as comfortable as possible, but it will also make your tank cycle faster. Want to cycle your tank as quickly as possible? Check out FishLab’s tips for speeding up the cycling process. Step 2: Adding your fish Before you add your fish, you want to acclimate them first. This will give them the best chance of survival. You want to feed your fish throughout the cycling process… You don’t want them to starve! When feeding your fish, however, it’s important that you don’t feed them too much. The more you feed them, the more they are going to poop. And the more they poop, the faster your ammonia levels are going to rise. Also, remove any uneaten food from the tank, a good aquarium net will make this easy. Any uneaten food left behind will break down into ammonia, causing the levels to rise. If a fish dies during the cycle, remove it from the aquarium ASAP. Its decaying body will also give off ammonia. Don’t panic if one of your fish dies. It doesn’t necessarily mean that all your fish will – this one might have been extra sensitive. Step 3: Test, test, test, and test again Now, use your ammonia test kit every 24 hours. What you are looking for is any sign of ammonia. Trust me. It won’t be long before it appears. Once your test kit returns positive for ammonia, it’s time to move to the next step. Step 4: Dealing with ammonia Once you detect ammonia, it’s time to start dosing with Seachem Prime. Follow the instructions on the bottle to determine what a single dose would be for your tank – the larger the aquarium, the more Prime you will need. Fortunately, a little goes a long way, and many of you will find that a single bottle of Prime will get you through an entire cycle. For this method, Seachem Prime is the most important ingredient. You see, a dose of Prime will bind ammonia, nitrite and nitrate for 24 to 48 hours, making them harmless to your fish. Picture Seachem Prime locking up ammonia, nitrite and nitrate in a jail cell for up to 48 hours. While in the cell, these nasties cannot harm your fish. However, once their time is up, and they are released, they will once again attack your fish. It is for this reason that you need to dose regularly with Seachem Prime, to keep these nasties locked up. A single dose of Prime will treat up to 1 part per million (ppm) of ammonia. Prime can be dosed up to 5 times safely. So, 2 ppm of ammonia can be treated with two doses of Prime, 3 ppm can be treated with three doses, and so on. Anything less than 1 ppm should be treated with a single dose. Between 1 ppm and 2 ppm, two doses. You get the idea. Oh, and it goes without saying that it’s better to overdose than underdose. *Once your test kit reads 2 ppm of ammonia, you should perform a 50% water change. This should cut your ammonia levels roughly in half. Repeat this process until you notice that your ammonia levels are not rising as quickly as before. Typically, this will take a week or two. When this happens, you are ready to move to the next step. Bookmark this page so that you can easily find it when you are ready for the next step! Step 5: Nitrites start to appear Next, you need to test for nitrites. If none are present, keep repeating the previous step and testing for nitrites daily until you get a positive result. Now that nitrite has entered the equation, you need to make sure you are dosing with enough Prime to protect your fish from both ammonia and nitrites. Fortunately, working out your new dosage is pretty simple – just add your nitrite and ammonia readings together. Let’s say your test returns the following… Ammonia 0.25 ppm Nitrite 1.5 ppm Adding the two together will give you a total of 1.75 ppm. A double dose of Prime will take care of it. This time, if your combined ppm of ammonia and nitrite reaches 4, perform a 50% water change. Keep repeating this. You will eventually notice that your ammonia drops to zero. This is a good thing – bacteria are eating the ammonia as quickly as it is being produced, resulting in a zero reading. Continue daily dosing and testing for ammonia and nitrites. Once your nitrite levels stop rising as quickly, you are ready for the next step. Step 6: Nitrates appear Now, you want to test for nitrates. If none are present, keep repeating the previous step and testing for nitrates daily until you get a positive result. Once nitrates are present, you are nearing the end (woohoo!). Continue testing for ammonia, nitrites and nitrates. Your ammonia levels should still be zero, and your nitrite levels should be declining. Keep dosing with Prime until both your nitrite and ammonia levels are zero. At this stage, the beneficial bacteria are eating them as quickly as they are being produced. Congratulations! You have successfully completed a fish-in cycle. ... show more
Reviewed in the United States on May 2, 2021 by Cory Cory
    • Fish saver for new Tanks
Size: 250 mL Style: Conditioner
Review Image by Equanim1ty Equanim1ty
I never had the patience to wait for nitrogen cycle for any of the tanks however I found a combination that works every single time without a single fish fatality. Seachem Prime+ Tetra self start + API master test kit. Seachem Prime not only dexotify chlorine and metals but also ammonia and nitrites. The two toxins that kills fish in new tanks. It even allows to go upto 5x the dosage so I just test water parameters for first 3 weeks (API master test kit) and manage it with weekly 50% water changes and Seachem prime being added to the water. Usually I mix distilled and tap water at 40/60 ratio to bring the water to right PH and hardness since tap water in my area is highly alkaline. By then the ammonia and nitrite released get attacked by the Tetra beneficial bacteria and the plants suck up the nitrates, they keep multiplying until the tank completes the nitrogen cycle. Another constant is the temperature. I maintain it at 79 for my Bettas and I also use Seachem Acid buffer and Ph regulator sometimes. Legacy way of doing the wait game for nitrogen cycle is not required with products like this in the market. ... show more
Reviewed in the United States on June 22, 2023 by Equanim1ty Equanim1ty
    • Superior
Size: 50 ml Style: Conditioner
I also have a beta water conditioner but I found this to be way better. Super easy to treat with and does a lot of heavy lifting, I occasionally still use the beta conditioner if the metal in the water is higher or if the water is harder than I’d like, but really this is my go to from now on.
Reviewed in the United States on August 1, 2023 by Katie Reed
    • Kept my fish safe from ammonia and nitrites
Size: 500 mL Style: Conditioner
When I was first cycling my tank, i had a CRAZY nitrite spike for about a week. I dosed prime daily for the entire time, and none of them died! None of them showed any kind of weird behavior, and none of them showed any signs of gill burn. People on the internet argue about whether this stuff can actually keep your fish safe. I maxed out the nitrites on my api test kit, and they were all fine thanks to seachem prime. ... show more
Reviewed in the United States on July 18, 2023 by TJ
    • Fabulous product
Size: 500 mL Style: Conditioner
Seachem makes a fabulous product highly recommend this product if you're in the fish aquarium hobby does a really good job.
Reviewed in the United States on August 2, 2023 by Joe Loftin
    • The best!!
Size: 500 mL Style: Conditioner
am been using this for year and work amazing.
Reviewed in the United States on August 5, 2023 by jorge
    • Excellent product for water conditioning and ammonia treatment!
Size: 250 mL Style: Conditioner
I use this product for water changes as well as to control ammonia spikes in my 20 gal tank and it works perfectly!
Reviewed in the United States on July 25, 2023 by PonyMomma
    • The best!
Size: 500 mL Style: Conditioner
Cannot get much easier! 1 tiny capful does 50 gallons of water. I use nothing else. It's PRIME for me all the way!
Reviewed in the United States on July 22, 2023 by Derek

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...