--- product_id: 174345779 title: "Seachem Prime, 100 Ml / 3.4 Fl. Oz" brand: "seachem" price: "£11.03" currency: GBP in_stock: true reviews_count: 13 category: "Seachem" url: https://www.desertcart.co.uk/products/174345779-seachem-prime-100-ml-3-4-fl-oz store_origin: GB region: United Kingdom --- # Seachem Prime, 100 Ml / 3.4 Fl. Oz **Brand:** seachem **Price:** £11.03 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Seachem Prime, 100 Ml / 3.4 Fl. Oz by seachem - **How much does it cost?** £11.03 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/174345779-seachem-prime-100-ml-3-4-fl-oz) ## Best For - seachem enthusiasts ## Why This Product - Trusted seachem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Prime is the complete and concentrated conditioner for both fresh and salt water Prime may be used during tank cycling to alleviate ammonia/nitrite toxicity and prime detoxifies nitrite and nitrate, allowing the biofilter to more efficiently remove them It will also detoxify any heavy metals found in the tap water at typical concentration levels 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 Review: Great even for small Aquarium s - I have an aquarium since 2014 and it was from 2025 end and early 2026 that I found my fishes dying repeatedly .I found Seachem Prime and after every water change I started using this as directed and my fish friends love it .Great product. Review: Urmila Toke - Very good ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000255PFI | | Best Sellers Rank | #2,012 in Pet Supplies ( See Top 100 in Pet Supplies ) #17 in Water Treatments | | Brand | Seachem | | Brand Name | Seachem | | Customer Reviews | 4.6 out of 5 stars 7,110 Reviews | | Global Trade Identification Number | 00000116043502 | | Item Form | Liquid | | Item Weight | 3.5 Ounces | | Liquid Volume | 100 Millilitres | | Manufacturer | SEACHEM LABORATORIES | | Manufacturer Part Number | 075222 | | Model Number | 67104350 | | Net Quantity | 250 Milliliters | | Target Species | Fish | | UPC | 703062507042 000116043502 | | Unit Count | 250 Milliliters | | Warranty Description | no warranty available | ## Product Details - **Brand:** Seachem - **Item Form:** Liquid - **Item Weight:** 3.5 Ounces - **Liquid Volume:** 100 Millilitres - **Manufacturer:** SEACHEM LABORATORIES ## Images ![Seachem Prime, 100 Ml / 3.4 Fl. Oz - Image 1](https://m.media-amazon.com/images/I/61ZKj2Dnv6L.jpg) ![Seachem Prime, 100 Ml / 3.4 Fl. Oz - Image 2](https://m.media-amazon.com/images/I/81vL-MMNcDL.jpg) ![Seachem Prime, 100 Ml / 3.4 Fl. Oz - Image 3](https://m.media-amazon.com/images/I/81V03WVV28L.jpg) ![Seachem Prime, 100 Ml / 3.4 Fl. Oz - Image 4](https://m.media-amazon.com/images/I/818XhtmBS-L.jpg) ![Seachem Prime, 100 Ml / 3.4 Fl. Oz - Image 5](https://m.media-amazon.com/images/I/91ElptHhL2L.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Great even for small Aquarium s *by D***U on 13 May 2026* I have an aquarium since 2014 and it was from 2025 end and early 2026 that I found my fishes dying repeatedly .I found Seachem Prime and after every water change I started using this as directed and my fish friends love it .Great product. ### ⭐⭐⭐⭐⭐ Urmila Toke *by U***E on 9 May 2026* Very good ### ⭐⭐⭐⭐⭐ A Saviour! *by J***E on 25 January 2026* No more worries when topping up or changing water using normal tap water. ## Frequently Bought Together - Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 100 ml - API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored - Seachem Stability Fish Tank Stabilizer - For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1) --- ## 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.co.uk/products/174345779-seachem-prime-100-ml-3-4-fl-oz](https://www.desertcart.co.uk/products/174345779-seachem-prime-100-ml-3-4-fl-oz) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-22*