Finfern honest freshwater care

🩺 Your free vet-prep sheet

Your Julii Cory 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
Julii Cory — 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 julii cory
What I'm seeing

🚨 Is this an emergency now?

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

  • Whole group constantly gasping at the surface (not just the odd quick gulp of air): test water and check aeration/oxygen and filter flow immediately.
  • Ammonia or nitrite reading above 0 ppm, or a sudden pH/temperature swing: do a water change with dechlorinated, temperature-matched water and confirm the tank is actually cycled — this is the top cause of cory deaths.
  • Barbels ('whiskers') worn down, stubby or eroded: usually sharp or dirty substrate, or poor water quality — switch to clean fine sand and tighten up maintenance, and seek help if they don't recover.
  • Red, inflamed or streaky patches, clamped fins, cotton-wool tufts, or rapid weight loss: signs of disease/infection or malnutrition — improve water quality and diet and consult an aquatic vet or an experienced fishkeeping source. (Triage, not a diagnosis.)
  • A fish lying on its side, breathing heavily and not foraging with the group: isolate the cause via water testing first, then get species-appropriate help fast.

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
20-26 C (68-79 F). They sit on the cooler end for tropical fish, so a heater set around 22-25 C suits them; avoid the high-80s F that some old care sheets list.
pH
5.5-7.5. They are adaptable but happiest in soft, slightly acidic to neutral water; a stable value matters more than chasing a perfect number.
Hardness
Soft to moderately hard: about 2-12 dGH (SeriouslyFish). Stability trumps precision — big swings stress them more than a steady "wrong" number.
Minimum tank
Keeper-facing minimum for a starter group of 6 is around 75 litres (20 US gal / ~17 imp gal). SeriouslyFish recommends a tank with a base footprint of at least 90 x 30 cm (36 x 12 in), i.e. roughly 80+ litres (~21 US gal) — and honestly, a "20-long" style tank with more floor space beats a taller 20 gal every time, because these are bottom-foraging fish that use swimming LENGTH, not height. Bigger footprint = bigger, calmer group.
Filtration & flow
Cycled, well-oxygenated filtration with gentle-to-moderate flow. They come from flowing streams so they tolerate a decent current and appreciate oxygen, but they should not be blasted around the tank; aim a spray bar or nozzle to break the flow. A mature filter and clean substrate are more important than raw current.
Diet
Omnivore / foraging bottom-feeder. Give sinking foods: quality sinking pellets or wafers, plus frozen/live bloodworm, daphnia, brine shrimp, Tubifex. They are NOT algae eaters and must be fed directly — do not rely on "leftovers" from other fish.
Tankmates / temperament
Peaceful, busy, and completely non-aggressive — a classic community "clean-up looking" bottom dweller that is in fact an active social forager, not a doormat and not a bully.

⚕️ 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?