--- product_id: 48273406 title: "Seachem Prime Water Conditioner, 250 ml" brand: "seachem" price: "€ 28.94" currency: EUR in_stock: true reviews_count: 13 category: "Seachem" url: https://www.desertcart.de/products/48273406-seachem-prime-water-conditioner-250-ml store_origin: DE region: Germany --- # Safe for fish, plants & invertebrates Highly concentrated formula Detoxifies ammonia & nitrite Seachem Prime Water Conditioner, 250 ml **Brand:** seachem **Price:** € 28.94 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your aquarium game with Seachem Prime — because your fish deserve the best! ## Quick Answers - **What is this?** Seachem Prime Water Conditioner, 250 ml by seachem - **How much does it cost?** € 28.94 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/48273406-seachem-prime-water-conditioner-250-ml) ## Best For - seachem enthusiasts ## Why This Product - Trusted seachem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Clean & Clear Dosing:** No smell, no residue—ensures pristine water quality without clouding or stress to aquatic life. - • **Ammonia & Nitrite Detox:** Neutralizes harmful toxins instantly, supporting a thriving, healthy aquatic environment. - • **Long-Lasting & Reliable:** 250ml bottle lasts for months, making it the go-to choice for daily or emergency water conditioning. - • **Universal Compatibility:** Perfect for both freshwater and saltwater tanks—your all-in-one water care solution. - • **Power-Packed Purification:** One capful treats 40L, delivering potent chlorine & chloramine removal for crystal-clear water. ## Overview Seachem Prime Water Conditioner is a concentrated, multi-functional treatment designed for both freshwater and saltwater aquariums. It effectively removes chlorine, chloramine, and detoxifies ammonia and nitrite, ensuring a safe and healthy environment for fish, plants, and invertebrates. With a long shelf life and no unpleasant odors or residues, it’s ideal for routine maintenance, new setups, or emergency water conditioning. ## Description Product Description Seachem Prime 250Ml Directions For fresh and saltwater: Use 1 capful (5 mL) for each 40 L (10 US gallons) of aquarium water. best results, use daily or every other day. Shake well before use. Do not remove filter media. Safe plants, fish, invertebrates. With treatments containing chlorine chloramine. Box Contains water treatment Review: Strong, reliable, and multi-use—solid water treatment for chlorine, ammonia, and nitrite control. - This bottle’s built for serious water prep—removes chlorine, chloramine, detoxifies ammonia and nitrite, and supports biofilter health. Geared toward freshwater and marine tanks, whether you’re doing full water changes or topping up. One capful treats 200L, so the 500ml bottle lasts ages. Works well in van stash, fish rooms, or home aquariums where water quality needs to stay tight. No smell, no clouding, and safe for all species. Ideal for new setups, emergency spikes, or routine maintenance. Can be used alongside meds and other treatments without clashing. Best dosed with a syringe or pipette for accuracy—cap measurements are rough. 👍 Pros ✅ Highly concentrated—small dose, big coverage ✅ Detoxifies ammonia and nitrite—supports cycling ✅ Safe for all fish, inverts, and plants ✅ No smell or residue—clean dosing ✅ Long shelf life—stays potent 👎 Cons ❌ Cap dosing is vague—use a syringe for precision ❌ No colour indicator—can’t see it in water ❌ Not a full-on bacteria booster—use with bio support if needed Review: Perfect! - worth the price and it lasts ages ## Features - Warning:Not suitable for children under 10 months. - Complete and concentrated conditioner for both fresh and saltwater - Removes chlorine, chloramine - Detoxifies ammonia, nitrite, and nitrate - Model number: 020042 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002568S6 | | Allergen Information | Gluten Free | | Best Sellers Rank | 514 in Automotive ( See Top 100 in Automotive ) 12 in Greases & Lubricants | | Brand | Seachem | | Brand Name | Seachem | | Country Of Origin | USA | | Customer Reviews | 4.8 out of 5 stars 37,233 Reviews | | Global Trade Identification Number | 00000116043601 | | Included Components | Water conditioner | | Item Form | Liquid | | Item Type Name | Seachem Prime Water Conditioner | | Item Weight | 10.2 Ounces | | Item form | Liquid | | Item weight | 10.2 Ounces | | Liquid Volume | 250 Millilitres | | Liquid volume | 250 Millilitres | | Manufacturer | Seachem | | Manufacturer Part Number | 075223 | | Model Number | 67104360 | | Number of Packs | 1 | | Pet Type | Fish | | Product Warranty | 2 years | | Target Species | Fish | | UPC | 634252024745 000116043601 707005178771 | | Unit Count | 250.0 millilitre | | Unit count | 250.0 millilitre | ## Product Details - **Brand:** Seachem - **Item form:** Liquid - **Item weight:** 10.2 Ounces - **Liquid volume:** 250 Millilitres - **Number of Packs:** 1 ## Images ![Seachem Prime Water Conditioner, 250 ml - Image 1](https://m.media-amazon.com/images/I/61aPb4rk8cL.jpg) ![Seachem Prime Water Conditioner, 250 ml - Image 2](https://m.media-amazon.com/images/I/81Q5CnYWOkL.jpg) ![Seachem Prime Water Conditioner, 250 ml - Image 3](https://m.media-amazon.com/images/I/61DVJNjihJL.jpg) ![Seachem Prime Water Conditioner, 250 ml - Image 4](https://m.media-amazon.com/images/I/61QTPBg3NNL.jpg) ![Seachem Prime Water Conditioner, 250 ml - Image 5](https://m.media-amazon.com/images/I/71b79qr2yXL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Instruction reads use 1 capful for every 50 gallons of new water. So a 35% change on 55 gal. tank, takes 1/4 cap? Sounds too good to be true.** A: Per Seachem's instructions, if you are doing a partial water change of 35%, if you are adding water directly from the tap (such as with a water changer such as a Python or Aqueon) you add enough Prime for the volume of the whole tank. On the other hand, if you're removing 35% and then adding the water using a bucket, you can dechlorinate the amount of each bucket. For example, if you're using a 3 gallon bucket, 6 drops Prime per bucket, and then add that to the tank. The Prime works almost immediately, so just add the drops to the bucket, and then it is ready to pour into your tank. **Q: How long does it take to work when setting up a new tank? Thanks!!** A: this removes the chlorine, etc. almost immediately, I add it to the aquarium when doing water changes, ands just pour the water into the tank. remember this just removes the harmful chemicals, your tank will still have to cycle through the nitrogen cycle if you are setting up a new tank. **Q: I end up with alot of foam at the top of my aquariums when I add prime,Have I added too much to my tap water changes,My Tap water is high in iron** A: The small bottle of prime has a flip cap which allows you to add drops. If you have the large bottle of Prime use an eye dropper. When doing a water change, fill a clean, never seen soap or chemicals bucket of fresh water and add Prime to this fresh water, not directly into your tank - 2 drops per gallon. I also do not get foam. I do a 50 - 60 percent water change weekly along with a gravel vac. If you are stll getting foam after a gravel vac and water change I would suggest you give Seachem a call. They have great customer service. When cleaning your tank, give your filter sponge, floss a swish around in used tank water also to remove some of the gunk and put right back in. Do not rinse in untreated fresh water, by doing so you can lose your cycle. **Q: I'm looking to remove chlorine from my pool, will this work?** A: It will work but there may be less expensive options from a pool dealer. It decholorinates any typerson of water. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Strong, reliable, and multi-use—solid water treatment for chlorine, ammonia, and nitrite control. *by G***E on 20 September 2025* This bottle’s built for serious water prep—removes chlorine, chloramine, detoxifies ammonia and nitrite, and supports biofilter health. Geared toward freshwater and marine tanks, whether you’re doing full water changes or topping up. One capful treats 200L, so the 500ml bottle lasts ages. Works well in van stash, fish rooms, or home aquariums where water quality needs to stay tight. No smell, no clouding, and safe for all species. Ideal for new setups, emergency spikes, or routine maintenance. Can be used alongside meds and other treatments without clashing. Best dosed with a syringe or pipette for accuracy—cap measurements are rough. 👍 Pros ✅ Highly concentrated—small dose, big coverage ✅ Detoxifies ammonia and nitrite—supports cycling ✅ Safe for all fish, inverts, and plants ✅ No smell or residue—clean dosing ✅ Long shelf life—stays potent 👎 Cons ❌ Cap dosing is vague—use a syringe for precision ❌ No colour indicator—can’t see it in water ❌ Not a full-on bacteria booster—use with bio support if needed ### ⭐⭐⭐⭐⭐ Perfect! *by C***7 on 19 May 2026* worth the price and it lasts ages ### ⭐⭐⭐⭐⭐ Utter Fishy Lifesaver! *by H***R on 8 April 2021* I discovered yesterday, much to my horror, that my nitrite levels had spiked to around 4 - 5ppm - this is a toxic level for fish, my nitrate levels were up at around 50 (again not good news). I was gutted as I love the fish. I think the fault was not cycling the tank properly before I put my fish in and a few days after I bought my fish I changed my old and very used filter sponge for a brand new one - convinced I was doing my little fishies a lot of good! Yesterday afternoon, upon reading the results of my water test, I immediately did a 50 per cent water change and ordered this Seachem Prime as it had many reviews saying it immediately got rid of nitrites, nitrates and ammonia etc This morning when I woke up I did another 25 per cent water change and an hour later tested my water - I had managed to get my nitrite levels down to roughly 2ppm. This is still no good, they MUST read 0 or your fish are in danger. The Seachem Prime arrived today (less than 24 hours after ordering) and I immediately put 3ml into my 60L tank, which is 3x the stated dose but I had a nitrite emergency and felt happy all would be well. I read my water levels an hour later and the nitrite readings are now roughly 0 - 0.5. It has clearly had an immediate effect on these levels and probably saved my little fish. I also have 3 minuscule little fry in the tank and I am hoping it has saved their little lives as well. The nitrate levels are now at around 20 ish which is perfectly safe for fish. I am planning to put around 1ml of Prime into my water every 24 hours now, and do a 25 per cent water change twice a week until I think my tank has cycled fully. I will then reduce the Prime to once every 48 hours and continue to test, then once every 3 to 4 days and test to ensure there are no spikes and that my tank is cycled! I am so grateful for this product, I did not sleep a wink last night desperate to sort this problem out! Just to note, Seachem Prime can be used as a water conditioner by itself and it makes tap water safe for fish. However because this product had not arrived when I did my water changes I used API Stress Coat Plus in my new water which also makes tap water safe for fish as it removes chlorines and chloramines etc The Prime can be used in conjunction with other products, it will not harm the fish. In future when I do water changes I will use Prime only as my water conditioner. I also use a Gravel Cleaner liquid which breaks down waste and slows the build up of green algea. I cannot recommend this product enough if you have a nitrite spike, it will save fishy lives! UPDATE: LESS THAN 5 DAYS AFTER STARTING WITH THIS PRODUCT NITRITE AND NITRATE LEVELS BOTH 0. This is a great product. I'll now only use it as a water conditioner with my weekly water change! ## Frequently Bought Together - Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 250 ml - Seachem Stability Fish Tank Stabilizer - For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1) - API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.de/products/48273406-seachem-prime-water-conditioner-250-ml](https://www.desertcart.de/products/48273406-seachem-prime-water-conditioner-250-ml) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-07-07*