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.
Chat and find things for your tank
Talk with fellow fish keepers and find what your tank needs. Tap a card to take a look.
Chat rooms
Group rooms where hillstream keepers ask, answer and share tank stories.
Lamtharn Shop
Hillstream fish, equipment and food picked by the Lamtharn team, paid by PromptPay.
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.
56 species so far, and growing
Panda Loach
Yaoshania pachychilus
Strong
20–24 °C
From fast mountain streams on Dayaoshan, Guangxi, China. Needs cool water no warmer than 24 °C with very strong flow (15–20x turnover per hour) and should only go into a mature tank with biofilm-covered rocks. The black-and-white panda pattern is juvenile only - adults turn mottled brown.
Mahnert's Stone Loach
Schistura mahnerti
Strong
20–25 °C
From streams of western Thailand. Banded, and territorial like other Schistura. There is no established Thai common name.
Lagocephalus Goby
Sicyopterus lagocephalus
Strong
Stream goby that rasps algae and biofilm off rocks in fast water - add it only to a mature tank with algae-covered stones and strong flow, supplement with fine sinking food, and do not expect breeding because the larvae must go to sea.
Panda Garra
Garra flavatra
Moderate
22–27 °C
From streams of the Rakhine Yoma in western Myanmar. It grazes algae but is not a true algae eater - feed meaty foods (bloodworm, brine shrimp) plus vegetable-based sinking food, and keep five or more in a tank at least 90 cm long, as a lone fish bullies similar-shaped tank mates.
Glowlight Danio
Danio choprae
Moderate
18–26 °C
Tiny (about 3 cm) danio from Irrawaddy streams in northern Myanmar. Keep a group of ten or more with moderate current rather than a torrent, and fit a tight lid because it jumps through small gaps.
Glass Catfish
Kryptopterus vitreolus
Moderate
23–27 °C
Thai native from southern and eastern streams. Must be kept in a group of at least six - alone it stops eating and wastes away. Hovers mid-water in gentle flow. Long mislabelled in the trade as K. bicirrhis, which is a different species.
Lizard Loach
Homaloptera orthogoniata
Strong
21–25 °C
Elongate, lizard-like, clings to rock and wood. Not an algae grazer - needs meaty foods (bloodworm, brine shrimp, sinking pellets). Genus is under active revision; several species have moved to Balitoropsis.
Koh Chang Stone Loach
Schistura kohchangensis
Moderate
22–26 °C
Thai native from lowland streams around Koh Chang and the eastern seaboard; tolerates warmer water than upland species - a good first stream loach without a chiller.
Cobalt Blue Goby
Stiphodon semoni
Strong
22–28 °C
Biofilm grazer from fast, clear streams. Add only to a mature tank whose rocks already carry algae, keep flow strong and oxygen high, and add surface agitation as the water nears 28 °C.
Doctor Fish
Garra rufa
Strong
18–26 °C
Middle Eastern river fish that tolerates a very wide temperature range in the wild (some populations live in hot springs), but in a tank does best in fairly cool, fast, well-oxygenated water. Add it only to a mature tank with established biofilm, and keep a tight lid because it can climb glass.
White Cloud Mountain Minnow
Tanichthys albonubes
Moderate
16–22 °C
Not a Thai native but widely used in local stream tanks because it is a genuine coldwater fish. Do not keep above 24 °C for long - it shortens its life sharply.
Asian Striped Catfish
Mystus mysticetus
Moderate
23–27 °C
Thai native, nocturnal - feed once in the evening before lights out. Has sharp pectoral spines; move it with a cup rather than a net. The Thai name covers several Mystus species.
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, then press “Send a test” in settings. Once your phone buzzes, reminders are on.
Latest guides
All guides →Diaries from real keepers
All diaries →Latest questions from keepers
All questions →Common 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, then press “Send a test” there.
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”