---
product_id: 143108035
title: "Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz"
brand: "brightwell aquatics"
price: "£16.94"
currency: GBP
in_stock: true
url: https://www.desertcart.co.uk/products/143108035-alkalin8-3-concentrated-kh-buffer-supplement-for-all-marine-fish
store_origin: GB
region: United Kingdom
---

# carbonate source for reef health multi-component automatic buffering pH precisely balanced at 8.3 Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz

**Brand:** brightwell aquatics
**Price:** £16.94
**Availability:** ✅ In Stock

## Summary

> 🌟 Keep your reef thriving with rock-solid stability!

## Quick Answers

- **What is this?** Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz by brightwell aquatics
- **How much does it cost?** £16.94 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/143108035-alkalin8-3-concentrated-kh-buffer-supplement-for-all-marine-fish)

## Best For

- brightwell aquatics enthusiasts

## Why This Product

- Trusted brightwell aquatics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reef-Ready Purity:** Phosphate, silicate, and organic-free formula supports coral skeletal growth
- • **Custom Dosing Control:** Easily adjustable dosing with test kit for perfect aquarium balance
- • **Precision pH Stability:** Automatically maintains optimal pH 8.3 for thriving marine ecosystems
- • **Trusted American Quality:** Scientifically formulated and proudly made in the USA for superior reliability
- • **Consistent Alkalinity Boost:** Elevates and stabilizes KH to prevent dangerous fluctuations

## Overview

Brightwell Aquatics Alkalin8.3 is a concentrated KH buffer that automatically regulates pH to 8.3 and elevates alkalinity, ensuring a stable and healthy environment for all marine fish and reef aquaria. Free from phosphates and organics, it supports coral growth by providing essential carbonates. Made in the USA, this scientifically backed supplement offers precise dosing for consistent aquarium water quality.

## Description

Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz

## Features

- AUTOMATIC PH REGULATION – The Alkalin8.3 Concentrated KH Buffer Supplement is a multi-component automatic buffer that elevates alkalinity and adjusts pH to 8.3, providing stability for aquarium environments
- ELIMINATES INSTABILITIES – The aquarium buffer effectively eliminates pH and KH instability caused by poor salt mixes and ineffective buffering products. Simultaneously, it raises alkalinity to ensure a consistently stable aquatic environment
- CARBONATE SOURCE – This fish tank treatment provides a source of carbonates, a crucial component of aragonite, the mineral secreted by reef-building organisms. It contributes to their skeletal material and is free of phosphates, silicate, and organic materials, promoting water purity
- DIRECTIONS – For accurate dosing, utilize a test kit. Add up to 5 ml of the reef primer daily to a 30-gallon aquarium until the desired alkalinity (7 - 12 dKH) is reached. After achieving the desired level, dose as needed for maintenance, whether it be daily or weekly
- AMERICAN-MADE EXCELLENCE – Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium

## Product Details

- **Brand:** Brightwell Aquatics
- **Liquid Volume:** 8 Fluid Ounces
- **Item Weight:** 0.5 Pounds
- **Item Form:** Liquid
- **Target Species:** Fish

## Images

![Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz - Image 1](https://m.media-amazon.com/images/I/617jJgYrCUL.jpg)

## Available Options

This product comes in different **Size** options.

## Frequently Bought Together

- Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz
- Seachem Reef Calcium 250ml

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**Shop now:** [https://www.desertcart.co.uk/products/143108035-alkalin8-3-concentrated-kh-buffer-supplement-for-all-marine-fish](https://www.desertcart.co.uk/products/143108035-alkalin8-3-concentrated-kh-buffer-supplement-for-all-marine-fish)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-25*