🎯 Quick Summary

• Hydrogen Water → Best supported by early scientific research (H₂ is the active ingredient).

• Alkaline Water → Mostly about taste and marketing; limited physiological impact.

• Electrolyzed Water → Similar to alkaline water unless it also produces high H₂ levels.

Not necessarily — and this is one of the biggest misunderstandings in the water world.

💧 Short answer:

Hydrogen‑rich water is not automatically alkaline.
Its pH is usually neutral (around 7) unless the device also changes pH.

🧪 Why hydrogen water is not the same as alkaline water

• Hydrogen‑rich water is defined by dissolved H₂ gas, not by pH.

• Adding hydrogen gas does not change acidity or alkalinity.

• A good hydrogen generator can produce high H₂ concentration even in neutral pH water.

🔍 Where the confusion comes from

Some machines (like ionizers) produce:

• Alkaline water (high pH)

• With some hydrogen

So people think hydrogen = alkaline, but they are two different properties.

📌 Clear comparison

• Hydrogen‑rich water → Defined by H₂ concentration, usually neutral pH

• Alkaline water → Defined by high pH, may or may not contain hydrogen

• Electrolyzed water → Sometimes alkaline + hydrogen, depending on machine

🎯 Bottom line

If your hydrogen water cup is designed correctly, it produces neutral‑pH hydrogen water, not alkaline water.

If you want, I can check the specs of your specific hydrogen cup (from Shopee or Flying336) and tell you exactly what type of water it produces.

💧 What does TDS < 5 ppm mean?

🌊 TDS = Total Dissolved Solids

TDS measures how many dissolved substances are in the water.
These include:

• Minerals (calcium, magnesium, sodium)

• Salts

• Metals

• Organic matter

• Impurities

It’s measured in ppm = parts per million.

So TDS < 5 ppm means the water contains less than 5 parts of dissolved solids per 1 million parts of water — extremely pure water.

🧪 Why hydrogen cups require low TDS water?

Hydrogen generators (especially PEM/SPE types) work best with very pure water because:

• High TDS can damage the electrolyzer plates

• Minerals can cause scale buildup

• Impurities reduce hydrogen production efficiency

• Some devices will auto‑stop if TDS is too high (Flying336 does this)

That’s why Flying H2 Cup recommends:

• RO water 0 - 10 ppm

• Distilled water 0 - 2 ppm

• Mineral water          150 - 500 ppm

• TDS < 5 ppm

This ensures:

• Higher hydrogen concentration

• Longer device lifespan

• Cleaner, safer water output

🎯 Simple explanation

TDS < 5 ppm = extremely clean water with almost no minerals or impurities.
Perfect for hydrogen generation.

If you want, I can also explain:

1. Why high‑TDS water reduces hydrogen concentration

2. Whether you can use tap water

3. How to measure TDS with a meter

4. What happens if TDS is too high in your cup

Answer to the above 4 points 

💧 1. What is TDS? (Total Dissolved Solids)

TDS measures how many dissolved substances are in the water.
These include:

• Minerals (calcium, magnesium, sodium)

• Salts

• Metals

• Organic particles

• Impurities

It’s measured in ppm (parts per million).

So TDS < 5 ppm means the water is extremely pure — almost nothing dissolved in it.

⚠️ 2. Why high‑TDS water reduces hydrogen concentration

Hydrogen generators work by splitting water into hydrogen (H₂) and oxygen (O₂).
When TDS is high:

• Minerals interfere with the electrolysis reaction

• Hydrogen production becomes weaker

• More bubbles form on the plates instead of dissolving into the water

• The device may produce oxygen-rich water instead of hydrogen-rich water

• Hydrogen ppm drops significantly

In short:
More minerals = less hydrogen dissolved in the water.

⚙️ 3. Why hydrogen cups require low‑TDS water

Hydrogen devices — especially PEM/SPE types — are designed for pure water.
Low TDS protects the machine and improves performance.

Benefits of using low‑TDS water:

• ✔️ Higher hydrogen concentration (better ppm)

• ✔️ Cleaner electrolysis reaction

• ✔️ No mineral scaling on the plates

• ✔️ Longer device lifespan

• ✔️ More stable hydrogen output

This is why Flying336 recommends:

• RO water

• Distilled water

• Purified water

• TDS < 5 ppm

Your device even auto‑stops if TDS is too high — a safety feature.

🚱 4. Can you use tap water?

Generally no, unless your tap water is extremely soft.

Typical tap water TDS:

• Australia: 80–300 ppm

• Malaysia/Singapore: 50–150 ppm

• Taiwan: 100–300 ppm

This is far above the safe range for hydrogen cups.

Using tap water can cause:

• Mineral buildup

• Rust‑like deposits

• Reduced hydrogen output

• Device malfunction

• Shortened lifespan

So it’s best avoided.

📏 5. How to measure TDS with a meter

A TDS meter is simple to use:

1. Turn on the meter

2. Dip it into the water

3. Wait 2–3 seconds

4. Read the number on the screen

Interpretation:

• 0–5 ppm → Perfect for hydrogen cups

• 5–30 ppm → Acceptable for some devices

• 30–100 ppm → Not recommended

• 100+ ppm → Avoid completely

If your water is above 5 ppm, use:

• RO water

• Distilled water

• Bottled purified water

💥 6. What happens if TDS is too high in your hydrogen cup

If you use high‑TDS water:

• ❌ Hydrogen production drops

• ❌ Plates get coated with minerals

• ❌ Device may overheat

• ❌ Electrolysis becomes unstable

• ❌ Water may smell metallic

• ❌ Device lifespan shortens

• ❌ Some models will auto‑stop (Flying336 does this)

In extreme cases, high TDS can permanently damage the electrolyzer.

🎯 Simple summary

• TDS = Total Dissolved Solids

• TDS < 5 ppm = extremely pure water

• Pure water = better hydrogen production + longer device life

• Tap water = too many minerals → bad for hydrogen cups

• Always use RO, distilled, or purified water

If you want, I can also explain:

1. How hydrogen ppm works

2. How long hydrogen stays in the water

3. How to maximize hydrogen concentration in your cup

4. Whether Flying336 uses PEM/SPE technology

Just tell me what you want to explore next.

Answer to 1-4 above

Absolutely — here is a complete, organized, and easy‑to‑use master list of all the points we discussed about TDS, hydrogen cups, water purity, and device performance. This version is polished and structured so you can use it for your own notes, training materials, or even future flyers.

💧 Complete Explanation: TDS, Water Purity & Hydrogen Cup Performance

1️⃣ What is TDS? (Total Dissolved Solids)

TDS measures how many dissolved substances are present in water.
These include:

• Minerals (calcium, magnesium, sodium)

• Salts

• Metals

• Organic particles

• Impurities

Unit: ppm (parts per million)
Meaning:

• TDS < 5 ppm = extremely pure water

• TDS 5–30 ppm = low‑mineral water

• TDS 30–100 ppm = moderate minerals

• TDS 100+ ppm = high mineral content

2️⃣ Why hydrogen cups require low‑TDS water

Hydrogen generators (especially PEM/SPE types) are designed for pure water.

Benefits of low‑TDS water:

• ✔️ Higher hydrogen concentration (better ppm)

• ✔️ Cleaner electrolysis reaction

• ✔️ No mineral scaling on the plates

• ✔️ Longer device lifespan

• ✔️ More stable hydrogen output

• ✔️ Prevents overheating or malfunction

This is why Flying336 recommends:

• RO water

• Distilled water

• Purified water

• TDS < 5 ppm

3️⃣ Why high‑TDS water reduces hydrogen concentration

When water contains many minerals, several problems occur:

• ❌ Minerals interfere with the electrolysis reaction

• ❌ Hydrogen dissolves poorly because bubbles stick to mineral particles

• ❌ More oxygen is produced instead of hydrogen

• ❌ Hydrogen ppm drops significantly

• ❌ Water becomes cloudy or metallic‑smelling

In short:
More minerals = less hydrogen dissolved in the water.

4️⃣ What happens inside the device when TDS is too high

High‑TDS water causes:

• ❌ Mineral buildup on the electrolysis plates

• ❌ White or yellow scale deposits

• ❌ Reduced hydrogen output

• ❌ Device overheating

• ❌ Shortened lifespan

• ❌ Unstable electrolysis

• ❌ Metallic smell or taste

• ❌ Auto‑stop safety trigger (Flying336 has this feature)

In severe cases, the electrolyzer can be permanently damaged.

5️⃣ Can you use tap water?

Generally no, unless your tap water is extremely soft.

Typical tap water TDS:

• Australia: 80–300 ppm

• Malaysia/Singapore: 50–150 ppm

• Taiwan: 100–300 ppm

This is far above the safe range for hydrogen cups.

Using tap water can cause:

• Scale buildup

• Rust‑like deposits

• Poor hydrogen production

• Device malfunction

Conclusion: Avoid tap water.

6️⃣ How to measure TDS with a meter

A TDS meter is simple to use:

1. Turn on the meter

2. Dip it into the water

3. Wait 2–3 seconds

4. Read the number

Interpretation:

• 0–5 ppm → Perfect

• 5–30 ppm → Acceptable

• 30–100 ppm → Not recommended

• 100+ ppm → Avoid completely

7️⃣ Best water types for hydrogen cups

Recommended:

• ✔️ RO water

• ✔️ Distilled water

• ✔️ Purified water

• ✔️ Bottled water with TDS < 10 ppm

Avoid:

• ❌ Tap water

• ❌ Mineral water

• ❌ Alkaline water

• ❌ Spring water

• ❌ Well water

These contain too many minerals.

8️⃣ Why Flying336 specifically requires TDS < 5 ppm

Based on the Flying336 water‑quality page you have open, the device:

• Uses epoxy resin deionized filter material

• Checks water quality automatically

• Stops operation if TDS is too high

• Is designed for pure water electrolysis

• Prioritizes hydrogen concentration, not alkalinity

This confirms Flying336 produces neutral‑pH hydrogen water, not alkaline water.

9️⃣ Simple summary you can use for customers

• TDS = Total Dissolved Solids

• Low TDS = cleaner water + better hydrogen production

• High TDS = weak hydrogen + device damage

• Always use RO, distilled, or purified water

• Flying336 requires TDS < 5 ppm for best performance

If you want, I can also prepare:

• A bilingual Chinese–English version

• A flyer‑ready infographic layout

• A customer‑friendly explanation for marketing

• A technical explanation for training staff

Just tell me the style you want.