Mineral Pool vs Freshwater Pool in Thailand: The Complete Guide

When the conversation turns to pools that feel comfortable on the skin, many people are familiar with the term “mineral pool” and assume it is a chlorine-free system. In reality, mineral pools and freshwater pools are water treatment systems that work on distinctly different principles.

A mineral pool uses minerals such as magnesium and potassium together with electrolysis to generate chlorine for sanitising the water. So while the water feels softer and more comfortable than an ordinary saltwater system, chlorine remains central to how the system disinfects.

The NAKED Freshwater Pool System takes a different approach, using copper and silver ionisation (Cu/Ag) together with micro-oxidation to control algae and micro-organisms. This allows water quality to be maintained using only a very low level of chlorine.

This is the key distinction between the terms “Mineral Pool” and “True Freshwater Pool”.

What is a Mineral Pool?

The mineral pool is an evolution of the salt chlorinator, replacing sodium chloride as the primary salt with mineral salts such as magnesium chloride and Potassium chloride.

As water passes through the electrolysis cell, the system converts these mineral salts to produce chlorine that sanitises the pool.

The benefit users notice is water that feels silkier, and magnesium also helps bind fine particles together so the filtration system removes dirt more effectively.

What pool owners should understand,

however, is this: a mineral pool is still a chlorine-based sanitising system. It simply changes the type of salt used and adds the properties of minerals on top.

What Is a True Freshwater Pool System?

A true freshwater pool — the standard set by the NAKED Freshwater System — does not rely on a high mineral load to generate chlorine. It uses copper and silver ionisation instead.

Copper ions control algae growth, silver ions control bacteria, and micro-oxidation supports the overall water-quality process.

The clearest difference is in Total Dissolved Solids (TDS).

The NAKED Freshwater System operates at approximately 800–1,000 ppm TDS, against roughly 3,000–6,000 ppm for a mineral pool — around a quarter of the salinity, while delivering markedly better water quality.

A lower TDS level matters for pools, and especially in Thailand, because it reduces the salt and mineral load accumulating in the system — one of the factors associated with corrosion of equipment and materials around the pool.

NAKED Freshwater Pool vs Mineral Pool Comparison

ข้อมูลเปรียบเทียบในเอกสารต้นฉบับระบุหลักการและช่วงค่าของทั้งสองระบบไว้ในทิศทางเดียวกัน

Why TDS Matters for Pools in Thailand

Thailand is hot for most of the year, so pool water evaporates considerably.

When water evaporates, salts and minerals do not evaporate with it — they stay behind and accumulate in the pool. As fresh water is topped up again and again, TDS levels tend to climb.

For pools with stainless steel, a heat pump, an automatic pool cover, underwater lighting, natural stone and premium finishes, controlling water quality and dissolved-solids levels matters directly to the long-term service life of the system.

This is one reason a low-TDS freshwater system is particularly interesting for private homes, pool villas, hotels and resorts in Thailand.

So Which System Is Better?

The answer is not simply “which system is best”, but which system best suits the pool owner’s needs. but which system best suits the pool owner’s needs.

The mineral pool is a genuine improvement on the ordinary saltwater system. It gives softer water thanks to magnesium, and it remains a good option for anyone who appreciates the properties of mineral water.

But if the goal is to reduce chlorine use, lower salt and TDS levels in the water, limit the impact on equipment, and get as close as possible to the feel of fresh water, the NAKED Freshwater System is a compelling technology for the modern pool — particularly premium and luxury pools in locations such as Phuket, Samui, Hua Hin and Bangkok.

💧 NAKED Freshwater Pool — A Different Kind of Water

What many pool owners are looking for today is not simply “clear water”, but the quality of the water they feel every time they swim. but the quality of the water they feel every time they swim.

• • Water that is comfortable on skin and eyes
  • Low chlorine
  • Low TDS
  • Less burden from accumulated salts and minerals
  • And protection for pool equipment over the long term

This is the thinking behind the NAKED Freshwater Pool System.

Because a good pool should not only look good on the day it is finished — it should deliver good water and remain properly maintainable throughout its service life.
POOL&SPA — Thailand’s Pool & Wellness Specialist Since 1972