Finfern honest freshwater care

🩺 Your free vet-prep sheet

Your Lemon Tetra Vet-Prep Sheet

Fish vets are rare, and it is easy to freeze in a crisis. This is the one page to have ready — how to find a vet, what to bring, what to tell them, and the questions to ask. Print it and keep it by the tank.

Black & white saves ink and prints cleanly on any printer.

Not sure it's a vet trip yet? Run the symptom checker or the water-parameter interpreter first — many worries turn out to be a water or husbandry fix.

Finfern honest freshwater care · finfern.com
Lemon Tetra — Vet-Prep Sheet

🔍 Find an aquatic / fish vet — before you need one

  • Search the WAVMA aquatic-vet finder (the World Aquatic Veterinary Medical Association) — or search "aquatic / fish / exotics vet near me".
  • Call ahead and ask the key question: "Do you treat fish?" Few vets do — and ask the exam fee while you're on the phone.
  • Find and save one now, while things are calm — not in the middle of a crisis.

📇 Fill this in now — before the crisis

Two minutes now saves ten in a panic. Print it and keep it by the tank.

My fish vet
My lemon tetra
What I'm seeing

🚨 Is this an emergency now?

Act promptly — starting with a water test — if you notice any of these:

  • Fish looking pale, colourless, or clamped-finned and hiding: check the shoal size first, then test the water (ammonia/nitrite/nitrate) and check temperature. Treat it as a stress signal, not just cosmetics.
  • Any detectable ammonia or nitrite, or a sudden pH swing: do an immediate partial water change and confirm the tank is truly cycled; these are the fastest killers of otherwise-hardy fish.
  • Gasping at the surface, rapid gill movement, or lethargy: test water and check temperature and oxygenation, do a water change, and seek fish-keeping/vet help if it persists.
  • White spots (like grains of salt), cotton-wool tufts, rapid breathing, flicking/scratching on decor, or clamped fins: signs of a possible parasite or infection. Quarantine if you can, review water quality, and consult a vet or a trusted fish-health resource, do not guess at medications.
  • One fish suddenly bloated, hollow-bellied and wasting, or with frayed fins: isolate/observe, review water and diet, and get species-appropriate advice rather than self-diagnosing.

When in doubt, a vet call is never wrong — most issues are reversible if caught early.

🚗 On the way / while you wait

✅ Do

  • Test your water NOW — ammonia, nitrite, nitrate, pH and temperature — and correct the obvious (a big source of trouble is ammonia / nitrite).
  • Keep the fish in its own stable, dechlorinated tank water.
  • Move it to a hospital / quarantine tank if you already have one set up.
  • Keep the tank calm and dimly lit — stress makes almost everything worse.

⛔ Don’t

  • Don’t tip in OTC, aquarium-shop or forum “cures” blindly — many are harmful or just mask the real problem.
  • Don’t make a big sudden water change or swing the parameters.
  • Don’t add salt or medication without knowing the cause.

🎒 What to bring

  • A recent water-test result — ammonia, nitrite, nitrate, pH and temperature. Water quality is the root of most fish illness and the first thing a fish vet asks about.
  • Clear photos and a short video — it may not show the behaviour or symptom in the clinic.
  • A note of your setup and exactly what — and how often — you feed.
  • Only if the vet advises transporting the fish: the fish in a bag or tub of its OWN tank water.

🗣️ What to tell the vet

A general vet may not know this species. Come ready to explain its correct care:

Temperature
20-28 C (68-82 F). SeriouslyFish gives the full 20-28 C range; most keepers settle around 23-26 C (73-79 F), which suits a typical peaceful community.
pH
5.0-7.5 (SeriouslyFish). They lean soft and slightly acidic in the wild, but tank-bred stock adapts across this range as long as the value is STABLE. Around neutral (6.5-7.0) is an easy, safe target.
Hardness
Soft to moderately hard. SeriouslyFish lists 1-12 dGH; other reputable guides extend to roughly 2-15 dGH. Aim for the soft-to-medium end (about 3-12 dGH) and, above all, keep it steady rather than chasing a perfect number. KH of a few degrees helps hold pH stable.
Minimum tank
Keeper-facing minimum is around 75 L / 20 US gal, but footprint matters more than the raw number. SeriouslyFish recommends a tank of at least 80 x 30 cm (about 72 L / 19 gal), and roughly 60 cm of swimming LENGTH is the practical floor. Bigger and longer is genuinely better: a low, long tank lets a proper shoal spread out and behave naturally, whereas a tall, short tank of the same volume gives them less room to swim.
Filtration & flow
Gentle to moderate flow. They come from calm, slow waters, so a gently filtered, well-oxygenated tank suits them. Avoid a strong current that blasts them around; a mature, fully cycled filter matters far more than a powerful one.
Diet
Omnivore. Thrives on a varied menu, not just flakes.
Tankmates / temperament
Peaceful and community-safe. SeriouslyFish calls it very peaceful and an ideal resident of a well-planned community tank. Males form harmless, temporary sparring and dominance displays within the group, which is normal and actually part of the fun to watch.

⚕️ Most fish illness starts with water quality, not infection — bring a recent water test; it's the first thing a good fish vet will ask about. Fish medicine is specialised and few vets treat fish, so call ahead. Many aquarium-shop and OTC 'cures' are harmful or simply mask the real problem, so tell the vet exactly what (if anything) you’ve already added, and treat a sick fish in a separate hospital tank rather than dosing the whole display.

Then note which of the warning signs (above) you are seeing, when they started, and whether they are getting worse.

❓ Questions to ask

  • Do you treat fish? If not, can you refer me to a vet who does?
  • What are the likely causes — and could my water or setup be the cause?
  • What is the treatment plan, the likely cost, and what should I watch for at home?
  • How do I prevent this from happening again?