Salt & Additives
Alkalin8.3 (250ml, 500ml) pH buffer/Alkalinity Supplement
$8.99
We ship daily. Prices and availability may change. Images are for illustration only and may vary from the actual product. Stock is subject to change.
Out of stock
- Ships any business day
- Products we use on our own reefs
- Questions? Ask a reef keeper
Share
Product details
Product details
Alkalin8.3 (250ml, 500ml) pH buffer/Alkalinity Supplement is a marine aquarium alkalinity (carbonate hardness) and pH stabilizer formulated as a multi-component automatic buffer. In reef systems, alkalinity is consumed over time, which can lead to greater pH swings; Alkalin8.3 is designed to replenish alkalinity and help drive and maintain pH toward 8.3. It provides carbonates used for maintaining a stable buffering system, supporting the chemical balance reef-building organisms rely on for aragonite skeletal material.
Features:
- Raises alkalinity (KH) to support pH stability in marine aquaria
- Automatically buffers pH toward 8.3, then continues increasing alkalinity while keeping pH at target
- Helps reduce pH/KH instability that can result from poor salt mixes and less effective single-ingredient buffering products
- Supplies a source of carbonates, which are a major component of aragonite (reef skeletal mineral)
- Free of phosphates, silicate, and organic material
- Designed as a multi-component buffer rather than a single chemical KH booster
Specifications:
- Product name (shop listing): Alkalin8.3 (250ml, 500ml) pH buffer/Alkalinity Supplement
- Sizes available: 250ml; 500ml
- Target pH behavior: Adjusts pH to 8.3 and keeps pH unchanged once 8.3 is reached while alkalinity continues to increase
- Maximum recommended daily addition (basic guidance): Up to 5 ml (1 capful) per 30 US-gallons daily
- Basic dosing guidance: Dose daily until desired alkalinity is reached, then dose daily or weekly as needed to maintain alkalinity
- Advanced dosing conversion (measured effect): Each ml increases alkalinity by 3.1 dKH in 1 US-gallon of water
- Maintenance range guidance: Recommended to maintain alkalinity between 7–12 dKH (with a goal of about +/-1 dKH stability)
- Free from: Phosphates, silicate, and organic material





Reviews
There are no reviews yet.