---
product_id: 97876368
title: "Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 33.8 fl oz"
brand: "brand: brightwell aquatics"
price: "€ 75.41"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.sk/products/97876368-brightwell-aquatics-alkalin8-3-concentrated-kh-buffer-supplement-for-all
store_origin: SK
region: Slovakia
---

# Multi-component buffer pH stability booster USA made Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 33.8 fl oz

**Brand:** brand: brightwell aquatics
**Price:** € 75.41
**Availability:** ✅ In Stock

## Summary

> 🌟 Dive into Stability with Alkalin8.3!

## Quick Answers

- **What is this?** Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 33.8 fl oz by brand: brightwell aquatics
- **How much does it cost?** € 75.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/97876368-brightwell-aquatics-alkalin8-3-concentrated-kh-buffer-supplement-for-all)

## Best For

- brand: brightwell aquatics enthusiasts

## Why This Product

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

## Key Features

- • **Phosphate-Free Formula:** Keep your tank clean and clear of unwanted materials.
- • **Stabilize Your Aquarium:** Achieve a balanced ecosystem effortlessly.
- • **Boost Alkalinity with Ease:** Elevate your water quality for thriving marine life.
- • **Trusted Quality from the USA:** Support local manufacturing while enhancing your aquarium.
- • **Carbonate Source for Healthier Corals:** Nourish your reef with essential nutrients.

## Overview

Brightwell Aquatics Alkalin8.3 is a concentrated KH buffer supplement designed for all marine and reef aquariums. This multi-component formula effectively regulates pH levels, enhances alkalinity, and provides a reliable source of carbonates, all while being free from phosphates, silicates, and organic materials. Proudly made in the USA, it ensures a stable and healthy environment for your aquatic life.

## Description

Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 33.8 fl oz

## Features

- Multi-component automatic buffer that regulates pH for a more stable aquarium
- Helps increase pH stability by raising the alkalinity
- Provides a good source of carbonates
- Free of phosphates silicate & organic material
- Made in the USA

## Images

![Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 33.8 fl oz - Image 1](https://m.media-amazon.com/images/I/61Kge0OxrrL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ 







  
  
    Band aid for a bigger issue
  

*by I***E on Reviewed in the United States on July 14, 2019*

I like the brand. Product did what it’s supposed to.  It’s just not a feasible long term solution for reef tanks. It’s a band aid at best and not a product I would recommend dosing daily.  I’d use an Alkalinity and Calcium solution instead.

### ⭐⭐⭐⭐⭐ 







  
  
    Great Product!
  

*by P***R on Reviewed in the United States on October 16, 2020*

Have used this to keep my alkalinity on the money since i set up my nano reef 2 years ago. My corals have thrived. Balanced alkalinity alsi balances PH too. Remember to test your parameters regularly.

### ⭐⭐⭐⭐⭐ 







  
  
    Best results, best price.
  

*by R***4 on Reviewed in the United States on December 31, 2019*

Best product out there, been using all BRIGHTWELL products for yrs

---

## 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.sk/products/97876368-brightwell-aquatics-alkalin8-3-concentrated-kh-buffer-supplement-for-all](https://www.desertcart.sk/products/97876368-brightwell-aquatics-alkalin8-3-concentrated-kh-buffer-supplement-for-all)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-07*