In the stream and in the tank at home, it is the same nature
A living stream, in the tank at home
Set up feeding and water changes once, and Lamtharn reminds you on your phone at the times you choose. Mark a task done with one tap, and keep the rest of the evening for watching the tank.
- Free to use
- No card required
- Thai · English on every page
“A stream is not only something to listen to; there is a whole world under the water to discover”
Example of a daily task card in the app and the reminder that reaches your phone
More than a tank — a living stream
The story of Tulamtharn
Nature, streams and the tanks that connect them
Lamtharn began with hillstream keepers who could not find a Thai-language tool that understood how a flowing-water tank differs from an ordinary planted tank. We want everyone to keep their tank on schedule without remembering it all, and to have a place to learn, share, and tell the story of their own tank to people who keep the same fish.
Get to know Lamtharn
Forest, stream, people and the smallest lives are all connected
Nature always connects us
What it does for you
Everything a flowing-water tank needs, on a screen you can work one-handed while standing at the tank.
An underwater world you can touch
Stream fish the app already knows
A species database with recommended temperature, pH and current strength, filled in for you when you add a fish.
30 species so far, and growing
Tiger hillstream loach
Sewellia lineolata
Strong
20–24 °C
The star of any hillstream tank — grazes algae off rocks in strong current.
Spotted hillstream loach
Gastromyzon punctulatus
Strong
20–24 °C
Small, beautifully spotted, and happiest in cool, oxygen-rich water.
Sumo loach
Schistura balteata
Strong
20–24 °C
A playful bottom-dweller from Thai streams with a big appetite.
Queen danio
Devario regina
Strong
22–26 °C
Schools against the current mid-water; found in the streams of northern Thailand.
Three steps to start
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Add your first tank
Sign up with your email, then tell us what kind of tank it is and how big.
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Set the routine you already follow
Morning and evening feeds, a weekly water change. Starter schedules are suggested for each tank type.
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Turn on reminders
Install the free ntfy app, subscribe to the topic we generate for you, and let reminders come to your phone.
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General care
Species
Disease and treatment
Breeding
DIY
News
Diaries from real keepers
Nobody has shared a diary yet
You could be the first to share your tank’s story.
Start your own diaryLatest questions from keepers
No questions yet
Be the first to ask. No question is too basic when you are starting out.
Ask a questionCommon questions
The things people ask before signing up, answered here.
Do I need to install an app?
No — it works in your phone browser. If you want reminders to pop up on your screen, install the ntfy app (free on Android and iOS) and paste in the topic name the system generates for you in settings.
Is it really free?
During this open period every feature is free, with no limit on tanks or fish, and no card details needed.
Who owns my fish records?
You do. Everything is visible only to your own account, you can export it whenever you like, and you can delete your account together with all of its data yourself. A diary is shared with others only when you choose to open it.
How safe is my data?
Passwords are stored one-way hashed and cannot be read back, every page runs over https, and every query that fetches data is tied to the owning account — guessing a link still shows you nothing. Reminder messages go only to the ntfy server you configure yourself. We never sell or trade your data.
Nature · streams · tanks · small lives
Contact us
Questions, a chat, or an offer to help write a guide — get in touch.
“Care for nature today, for a more beautiful tomorrow”