Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 16.9 fl. oz
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Saturday, Nov 15
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Description
Complete and concentrated conditioner for both fresh and saltwater. Seachem 437 Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500ml
Brand: Seachem
Liquid Volume: 500 Milliliters
Item Weight: 0.61 Kilograms
Item Form: Liquid
Manufacturer: Seachem
Is Discontinued By Manufacturer : No
Product Dimensions : 6.6 x 2.3 x 2.5 inches; 1.34 Pounds
Item model number : SE0433
UPC :
Manufacturer : Seachem
Units : 16.9 Fluid Ounces
Best Sellers Rank: #11,625 in Pet Supplies (See Top 100 in Pet Supplies) #79 in Aquarium Water Treatments
#79 in Aquarium Water Treatments:
Customer Reviews: 4.9 4.9 out of 5 stars 2,234 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 15
This item is non-returnable:
Non-returnable due to Food safety reasons
View our full returns policy here.
Non-returnable due to Food safety reasons
View our full returns policy here.
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Top Amazon Reviews
This is the best water conditioner on the market! It also lasts forever if you only have a 30 gallon tank like I do. I throw it in there if my ammonia is too high and then do a water change the following day.
Reviewed in the United States on September 28, 2025 by Steph
Ive used several brands of aquarium chemicals and conditioners. Prime is the best Ive found that removes chlorine, chloromine, ammonia and some heavy metals. Its fantastic at doing this. Following the listed dosing instructions seldom leads to any issues. But, the dosing instructions are only estimates as every municipal water system has differing amounts of hazardous chemicals and can even vary hour to hour. You can safely overdose the suggested amount to treat heavily doped city water. Bit if you do overdose too much, and far exceed the amount of chemicals in the water, Prime will tend to go after oxygen in the water too. If you notice the fish at the top gasping for air after adding a large dose of Prime, youve likely overdosed Prime. You can solve this overdose within often minutes by having an air stone bubbling heavily in the tank water. This will usually get enough water and air circulated to get oxygen back into the water within minutes. Frankly most tanks can benefit from an air stone all the time anyway. But if you follow dosing instructions, youll find you can use less Prime than the other brands and save some money while protecting your fish from municipal chemicals. Prime doesnt add slimecoat to the water. So sensitive fish like Cories and Loaches are better served. You can also use Prime to clean filter media recycled with Ammonia. High doses of Prime removes the ammonia solution used to clean. It can be added at each water change or small doses can help alleviate ammonia or nitrite spikes temporarily. It can be purchased in small little 250ml bottles clear up to 2l bottles for ponds or if you use it to detoxiify ammonia soaked Purigen. It does have an expiration date but will isually at last a year or so after bottled. Just be sure its shaken and mixed before applying. Also both in the bottle and when nuetralizing chemicals, it gives off a strong sulphur odor that disipates quickly. Sniffing the bottle could make you sick. You can store it at room temperature but dont let it set out in sunlight or to freeze. This is the most important and reliable chemical treatment I use. And I use it often in my tanks, especialy during water changing days. I usually get 1L or 500ml at a time. If youve only got one small tank, the 250ml size might be better for you. I always keep it on hand.
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Reviewed in the United States on September 21, 2024 by Don Gray
This stuff is always great. I use it for my pet axolotl, and it's the exact product I would recommend for them specifically. It also works great for fish and other amphibians. It is VERY concentrated so a little goes a long way.
Reviewed in the United States on September 2, 2025 by Amanda Butler
Prime makes amazing pond chemicals , they are my go to brand to keep my pond water in a good state. They are very potent so the dose is small and it’s a good bang for your buck they last so long!
Reviewed in the United States on May 6, 2025 by Teresa Lima
An essential for all aquarium owners!
Reviewed in the United States on August 8, 2025 by Allie
So far so good!! Stinks to high heavens but that’s normal apparently. No issues so far and good size! I could see this lasting a long time for my 20 gallon tank.
Reviewed in the United States on May 19, 2025 by Gracie Newsome
I like fish tanks and keeping fish alive and happy. Do you? Then you should use Prime. I haven't compared prices in a while to other dechlorinators, but even if they are a lot cheaper I'd still use Prime. I do a 10% water change every day (yes, every day... I know I know, that seems excessive... but I like doing it, that's why I have a fish tank because I like taking care of them... besides, it's only 20 gallons so it takes me like eight minutes since I'm only changing 2 gallons and it seems to stress my fish out less and make them happy more than more infrequent but larger water changes) on my 20 gallon tank and a 500mL bottle lasts me about 9 months to a year. You don't need much per gallon. In fact, I've taken to putting a small hole at opposite ends of the aluminum covering when you first get it so I can limit how much I'm putting in because when dealing with small water changes it is actually kinda hard to not put way too much in (not that it would be a problem if I did, since Prime does not immediately harm fish if you overdose, which is also nice and a selling point). In conclusion: If you need dechlorinator, get Prime.
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Reviewed in the United States on July 20, 2023 by bakerwulf
Super reliable product. I've been using this for years.
Reviewed in the United States on June 12, 2025 by Emanon