--- product_id: 263417474 title: "Red Sea Kh/Alkalinity (Foundation B) - 500ml" brand: "red sea" price: "NZ$63" currency: NZD in_stock: true reviews_count: 5 url: https://www.desertcart.nz/products/263417474-red-sea-kh-alkalinity-foundation-b-500ml store_origin: NZ region: New Zealand --- # Easy dosing with measuring cup Balanced carbonate & buffer complex Precise alkalinity control Red Sea Kh/Alkalinity (Foundation B) - 500ml **Brand:** red sea **Price:** NZ$63 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate your reef game with precision and ease! ## Quick Answers - **What is this?** Red Sea Kh/Alkalinity (Foundation B) - 500ml by red sea - **How much does it cost?** NZ$63 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/263417474-red-sea-kh-alkalinity-foundation-b-500ml) ## Best For - red sea enthusiasts ## Why This Product - Trusted red sea brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Reef Essential:** Part of Red Sea’s complete Reef Care program, backed by a 4.8-star rating from reef enthusiasts. - • **Effortless Daily Dosing:** Comes with a measuring cup for hassle-free, automatic supplementation—never miss a dose. - • **Cost-Effective Reef Care:** Concentrated formula ensures long-lasting use without breaking the bank. - • **Balanced Coral Foundation:** Contains calcium, magnesium, strontium & carbonate in perfect harmony to fuel vibrant reef health. - • **Precision Alkalinity Boost:** Raises alkalinity by 0.1 dKH per 1ml per 25 gallons for optimal coral skeleton growth. ## Overview Red Sea KH/Alkalinity Foundation B is a 500ml liquid supplement designed to maintain optimal alkalinity and pH balance in reef aquariums. It delivers a precise blend of carbonate and essential minerals like calcium, magnesium, and strontium to support healthy coral skeleton formation. Easy to dose with the included measuring cup, this cost-effective formula is a cornerstone of Red Sea’s Reef Care program, trusted by aquarists worldwide. ## Description KH/ALKALINITY FOUNDATION® B Carbonate & buffer complex for balanced formation of Coral Skeleton KH Calcium, magnesium, strontium and carbonate are the basic foundation elements of coral skeletons. All of these elements need to be available in balanced proportions for coral health and growth. Red Sea’s KH/ALKALINITY is a complex of carbonate and other buffers present in seawater that maintain proper alkalinity and pH, and is part of Red Sea’s complete Reef Care program. Concentration: Liquid supplement: 1ml will raise the Alk level of 100 liters (25 gal) by 0.036 meq/l (0.1dKH) Powder supplement: 1g will raise the Alk level of 100 liters (25 gal) 0.12 meq/l (0.33dKH) 1 kg will make 10L of stock solution. ## Features - Add this liquid supplement to your aquarium daily to form the basic foundation of coral skeletons - Easy to use with automatic dosing - Balanced proportions for coral health and growth - Cost Effective - Include a measuring cup for easy dosing ## Technical Specifications | Specification | Value | |---------------|-------| | Allergen Information | BPA-Free | | Asin | B004E2DW78 | | Best Sellers Rank | #7,039 in Pet Supplies (See Top 100 in Pet Supplies) #35 in Fish Medication & Health Supplies | | Brand Name | Red Sea | | Country Of Publication | USA | | Customer Reviews | 4.8 4.8 out of 5 stars (112) 4.8 out of 5 stars | | Global Trade Identification Number | 00730773220236 | | Item Form | Liquid | | Item Type Name | Red Sea KH/ALKALINITY (FOUNDATION B) - 500ML | | Item Weight | 1 Pounds | | Liquid Volume | 500 Milliliters | | Manufacturer | TopDawg Pet Supply | | Manufacturer Part Number | 306037 | | Model Number | 23173 | | Number Of Packs | 1 | | Pet Type | Fish | | Target Species | Fish | | Unit Count | 1 Count | | Upc | 730773220236 | ## Product Details - **Brand:** Red Sea - **Item form:** Liquid - **Item weight:** 454 g - **Liquid volume:** 500 Milliliters - **Manufacturer:** TopDawg Pet Supply ## Images ![Red Sea Kh/Alkalinity (Foundation B) - 500ml - Image 1](https://m.media-amazon.com/images/I/81tqlVcRItL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Test regularly *by on Reviewed in the United Kingdom 24 May 2024* Increase the KH in my tank ### ⭐⭐⭐⭐⭐ Good product from trusted company *by on Reviewed in the United States 17 April 2018* Works good as a 2-in-1 alkalinity supplement for reef tanks. I didn't want the hassle of buying separate carbonate and bicarbonate products and then premixing them. This liquid product is easy to use and disperses quickly in the tank.I originally bought the Foundation A+B+C pack, but my reef depletes my alk much more quickly than my Mg and Ca so I bought the big Alk bottle this time. ### ⭐⭐⭐⭐⭐ Loving Red Sea Foundation A & B *by on Reviewed in the United States 2 November 2014* Two months ago, my local store aquarium expert had recommended that stop dosing with various Kent products and instead does my reef aquarium with Red Sea Foundation A and Foundation B. His recommendation was that I alternate the dosing daily (Foundation A one day; Foundation B the next).After doing this for about 1 month, the aquarium expert asked me how things were going and way I thought of the Red Sea foundation products. 30 days in, I was still a bit skeptical about this dosing regimen. Because of the alternative day dosing schedule, I was doing a lot of water testing - primarily measuring KH and Calcium every other day and adjusting my dosage based on the testing. ( you still complete your standard water tests as well )After 30 days, I wasn't seeing much of a difference in my reef tank.Two months into dosing my tank with Red Sea Foundation A & B, my corals have literally exploded in growth and energy.You end up adjusting and managing KH and Calcium with your dosing of Red Sea Foundation A & B. Both counteract each other, so high KH would reduce the Calcium and vice versa. Once you get the balance, you dose to maintaini it.I have to say that my corals are doing excellent. Each and every one, both LPS and SPS are doing great.Prior to this, I was dosing a number of Kent products. Using Red Sea Foundation A&B, things are much more simplified.You don't have to alternate doses daily as I do, but this works for me.I'd recommend Foundation A & B dosing. With a little patience, you will be happy with the end results. ## Frequently Bought Together - Red Sea Reef Foundation B Alkalinity (KH) Supplement, 500ml - Boosts Carbonate Levels for Strong Coral Skeletons in Reef & Marine Aquariums - Red Sea Reef Foundation A (Ca/Sr) Supplement, 500ml - Calcium & Strontium Additive for Healthy Coral Growth in Marine & Reef Aquariums - Red Sea Reef Foundation C Magnesium (Mg) Supplement, 500ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums --- ## 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.nz/products/263417474-red-sea-kh-alkalinity-foundation-b-500ml](https://www.desertcart.nz/products/263417474-red-sea-kh-alkalinity-foundation-b-500ml) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-09-10*