Troubleshoot
Ich in a Planted Tank: Shrimp-Safe Fix Order
True ich (Ichthyophthirius) is white grains that move through a free-swimming stage—not salt crystals or air bubbles. In a planted display with shrimp, skip copper; treat fish in QT when you can. Rule out ammonia burn and ragged fins from fin rot first.
- White spot
- Planted safe
- No copper
- Quarantine
What you’re seeing
Salt-like dots on fins/body, flashing, clamped fins, labored breathing. Dots fall off and reappear in waves. New fish last week is a classic trigger.
| Pattern | Likely driver |
|---|---|
| Dots on several fish after new arrival | True ich lifecycle |
| Only one side / stuck grains | Epistylis / fungus mimic—test water |
| Gasping + red gills, no dots | CO₂ / O₂ stress or ammonia |
| Ragged fins, no white salt look | Fin rot |
Likely causes (ranked)
New fish without quarantine
Trophonts hitchhike. Display tanks get seeded in days.
Quick test: Livestock added from a store bag this week.
Cold snap or heater fail
Ich prefers cooler water; stress drops immunity.
Quick test: Temp dropped overnight—see <a href="https://aquaplantshub.com/aquarium-heater-malfunction/">heater malfunction</a>.
Ammonia / nitrite stress
Damaged slime coat invites parasites.
Quick test: Liquid test NH₃ or NO₂ > 0.
Treating the display with copper
Kills shrimp and can burn plants; does not replace QT hygiene.
Quick test: You dosed copper with Neocaridina present.
Fix order
- Step 1 Confirm ich vs mimic + test water
-
Step 2
Move fish to QT when shrimp share the display
Display keeps plants + shrimp. Treat fish in a bare QT with sponge filter. No copper in shrimp tanks—ever.
-
Step 3
Heat carefully + meds labeled shrimp-safe
Raise QT toward 28–30°C only if species tolerate it (not for cool-water fish). Use ich meds that list invertebrate caution; follow full free-swimming cycle (often 7–14 days). Skip aquarium salt dumps that crash plants/shrimp.
-
Step 4
Fallout the display without copper
Keep lights moderate, do gentle water changes, vacuum mulm. Wait out the free-swimming stage with no fish hosts, or keep fish in QT until clear. Watch for secondary fin rot.
When to escalate
- Gasping without white spots → fish gasping / CO₂.
- Fins melting, no salt dots → fin rot.
- Shrimp crashing after meds → shrimp dying after WC / shock.
- Uncycled tank stress → new tank syndrome.
Helpful products
Related guides
- Fin rot — Differential
- Fish gasping / CO₂ — No spots
- Ammonia spike — Stress
- Cherry shrimp care — Invert safety
FAQ
Can I heat the display to cure ich?
Only if every fish tolerates it and you still finish a full lifecycle plan. Shrimp and cool species may suffer—prefer QT.
Is salt safe in planted tanks?
Light salt can stress many plants and shrimp. Prefer meds + QT over heavy salting the scape.
Will ich kill plants?
Ich targets fish. Overdosing copper or salt is what burns the aquascape.
How long until free-swimming stages die out?
Often about a week at warm temps with no fish hosts—longer if cool. Don’t restock early.
Epistylis vs ich?
Epistylis often follows dirty water and looks fuzzier/stuck. Fix water quality first.
Can bettas get ich in planted tanks?
Yes. See also betta planted care for stress triggers.
Aqua Plants Hub Editorial
