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

As someone who's been deeply involved in the aquarium hobby for over two decades, I can confidently say that Seachem Prime is, without a doubt, the single most essential product in my fish room. I was introduced to Prime when I first started out, and it quickly became the cornerstone of my water care routine. Twenty-plus years later, it remains the only water conditioner I trust and use in all my tanks. Prime does exactly what it promises, and it does it exceptionally well. It instantly neutralizes chlorine, chloramine, and ammonia, making tap water safe for your aquatic inhabitants. Beyond that, it detoxifies nitrite and nitrate, which is a huge bonus, especially during cycling or in emergency situations. The fact that it does all of this in a concentrated formula means a little goes a very long way, making the 1L bottle incredibly economical and long-lasting. What truly sets Prime apart, for me, is its reliability and the peace of mind it provides. I've never had a single issue with water parameters or fish health that could be attributed to Prime. It's truly a "set it and forget it" product that allows me to focus on the joy of the hobby rather than worrying about water quality. If you're new to the hobby, do yourself a favor and start with Prime. If you're a seasoned aquarist looking for the best, you already know what I'm talking about. I exclusively use Seachem products in my tanks because their quality and effectiveness are unmatched, and Prime is the shining star of their lineup. This isn't just a water conditioner; it's an investment in the health and longevity of your aquatic ecosystem. Five stars, hands down!

I bought this aquarium water conditioner for my Betta fish tank after struggling to get the water levels just right—and it made a huge difference! I was seeing numbers all over the place with my test kit, and this product helped stabilize everything quickly. It’s super easy to use—just a few drops, and you're good to go. Within a short time, the water parameters were back in the safe zone, and most importantly, my Betta is still happily swimming and looking healthier than ever. No weird smells, no cloudiness, just clean, conditioned water that’s safe for my fish. If you’re new to aquariums or just having trouble balancing your water, this is a great product to keep on hand.

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.

Seachem Prime has been my go to water conditioner for years because it truly works. I use it on all my aquascapes and it has never failed me. Most recently I set up a 20g UNS iwagumi tank and Prime made cycling and water changes simple and stress free. It neutralizes chlorine fast, protects livestock, and keeps parameters stable. A little goes a long way and the results are consistent every single time. If you keep shrimp, planted tanks, or high end scapes, this belongs in your cabinet. Prime is easily one of the most reliable products in the hobby.

Just what I needed seachem is always my go to. It was fast shipping, saved my fish and saved my money. Very easy to use the directions are listed on the back 1 cap per 50 gallons. It helped clear my water up. The price of this 500ml bottle will last you a while even if you have a larger tank.

The quality of this product is too good, it provides very good health and safety to my fish, it keeps the water clean, it does not affect the plant growth and definitely the size of the product it is too much worth what you pay.

Prime de Seachem es, sin duda, uno de los mejores acondicionadores de agua del mercado. Neutraliza instantáneamente cloro, cloraminas y amoníaco, lo cual es esencial tanto en cambios de agua como en emergencias. Además, ayuda a proteger a los peces reduciendo el estrés y facilitando la desintoxicación de nitritos y nitratos. Rinde muchísimo: solo se necesita una pequeña dosis por litro, lo que lo hace muy económico a largo plazo. Lo uso en todos mis acuarios y ha sido clave para mantener a mis peces sanos y el agua en perfectas condiciones. Recomendado al 100%, sobre todo si buscas seguridad y estabilidad para tus peces.

Le produit a un réel impact sur les analyses d'eau, très efficace à petite dose. Seul aspect dérangeant: son odeur de soufre à l'ouverture de la bouteille. Mais une fois dans l'eau ça ne sent rien. J'ai reçu par contre une bouteille abimée, l'embouchure était tordue et une fois enlevé l'opercule, l'étanchéité était compromise, j'ai dû transvaser le produit dans une autre bouteille.

The prime cleans up the slime! It is so divine, you'll certainly not mind the word on the vine is this stuff is sublime! Make sure to choose prime, for your brine!

Great product and such a small amount required at water change. Highly recommended. I used for my newly hatched Axolotl and also my tropical fish tank.

Producto necesario e indispensable para todos los que tenemos acuario en casa. Rinde muchísimo ya que una sola gota trata varios litros y el efecto es inmediato. Si utilizas agua del grifo para cambios de agua es necesario utilizar prime para eliminar cloro y cloraminas. Además sirve para una emergencia temporal donde tengas un pico de amonio o nitritos reduciéndolos de manera inmediata. Es un seguro para tu acuario tenerlo en casa. Totalmente necesario y de la marca reconocida Seachem.