Your Celebes Rainbowfish Vet-Prep Sheet
Finfern honest freshwater care · finfern.com Celebes Rainbowfish — 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.
🚨 Is this an emergency now?
Act promptly — starting with a water test — if you notice any of these:
- Fish gasping at the surface, clamped fins, sudden hiding, or loss of colour soon after adding them: stop and TEST the water for ammonia, nitrite and nitrate right away. In a warm, alkaline tank even a trace of ammonia is dangerous - do a water change and confirm the tank is truly cycled.
- Any detectable ammonia or nitrite (should be zero) or a nitrate spike: do an immediate partial water change with dechlorinated, temperature-matched water and test again the next day.
- Rapid pH or temperature swing (e.g. after a big or cold water change): this species is very sensitive to sudden changes - correct it gradually, never with a shock. Check your heater and match new water to tank temperature.
- Torn or ragged trailing fins, or a fish being chased: usually a nippy/aggressive tankmate or too small a group - review stocking rather than treating blindly.
- White spots, cotton-like tufts, ulcers, or persistent flicking/rubbing: treat as a health red flag - isolate if you can, keep water pristine, and get advice from an aquatic vet or an experienced fishkeeper. This is triage, not a diagnosis.
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
- 22-28 C (72-82 F); a stable mid-range around 24-26 C (75-79 F) is a comfortable target.
- pH
- 7.0-8.0. This is a hard-water fish and will not do well in acidic (below 7.0) water.
- Hardness
- Medium to hard and gently alkaline: roughly GH 10-25 dGH. Do not try to soften the water for this species - hard, alkaline water is what it wants.
- Minimum tank
- Keeper-facing minimum: a footprint of at least ~75 cm of swimming length, roughly 75-90 litres (about 20-24 US gal), and honestly a "20-gallon long" (or bigger) shape rather than a tall cube. SeriouslyFish's stated base dimensions are 76 x 30 cm (~68 L / ~18 US gal) for a small group. Bigger-is-better reality: these are restless, fast swimmers and the males display across open water, so a longer 90-120 cm tank (~110 L / ~30 US gal or more) lets you keep a real group and gives them room to behave naturally. Swimming LENGTH matters far more than raw volume here.
- Filtration & flow
- Clean, well-oxygenated water with gentle-to-moderate flow. Wild fish live in clear, slow-moving streams, so avoid a fierce current; a well-oxygenated tank with steady, not turbulent, movement suits them. Sensitive to poor water quality, so filtration should comfortably keep ammonia and nitrite at zero.
- Diet
- Omnivore, and an easy eater once settled. Takes good-quality dried food (flake, micro/nano pellets) plus regular small frozen or live meaty foods - daphnia, baby brine shrimp, cyclops, small bloodworm/mosquito larvae, tubifex. It has a small mouth, so keep food items tiny. Variety is what brings out the best colour.
- Tankmates / temperament
- Very peaceful and non-aggressive, but genuinely shy and skittish - especially in the first days after a move or in a sparse tank. Males spar harmlessly by flaring their fins at each other rather than actually fighting.
⚕️ 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?