Species guide
Best Nano Fish for Planted Tanks (Roundup)
Fish
The best nano fish for planted tanks stay under 4 cm, swim midwater or bottom without uprooting plants, and match shrimp-safe goals. This roundup covers neons, chili rasbora, celestial pearl danios, pygmy corys, and otos — not angelfish or rams in nano volumes.
- Under 4 cm
- Planted safe
- Schooling picks
- Shrimp-aware
Quick facts
| Tank | 40 L+ for most nano schools |
|---|---|
| Temp | 22–26 °C community range |
| Schooling | 6+ for tetras/rasbora |
| Shrimp-safe | Neons, rasbora, otos — not angels |
| Bottom | Pygmy/habrosus cory on sand |
| Algae | Otos on mature tank biofilm |
| Avoid | Angelfish, goldfish in nano |
| Link | See individual species guides |
Overview
Pick fish for tank size first. Midwater color: neon tetra · chili rasbora · cardinal tetra · celestial pearl danio. Bottom: corydoras. Algae: otocinclus on mature wood.
Not nano: angelfish · German blue ram need bigger/warmer setups. Shrimp tank: fish with shrimp · budget nano.
Stock nano planted tanks right
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Step 1
Match fish to tank volume — 40 L ≠ angelfish
Use species guides for minimum sizes.
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Step 2
School shoaling fish — six minimum
Lonely tetras stress and hide.
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Step 3
Cycle before livestock — fishless preferred
See fishless vs fish-in cycle.
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Step 4
Sand for corys; mature tank for otos
Wrong substrate and new tank kill bottom/algae crew.
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Step 5
If shrimp colony is goal, skip predators
No angels; cautious with rams and bettas.
Common problems
Fish dying week one
Why: Uncycled tank or wrong species for volume.
Fix: Test ammonia; downgrade fish size or upgrade tank.
Hiding nano fish
Why: School too small or aggressive tank mate.
Fix: Add numbers; remove bully.
Otos dying fast
Why: Added to sterile new tank.
Fix: Wait for biofilm — otocinclus guide.
Shrimp disappearing
Why: Wrong fish choice.
Fix: Switch to shrimp-safe list.
Combinations that work
- Classic nano: neons + corys + cherry shrimp.
- Warm nano: chili rasbora + shrimp in 40 L.
- Algae crew: otos + Amano — mature tank.
- Avoid: angelfish, goldfish, aggressive barbs in planted nano.
Gear for this species
TetraMin Tropical Flakes Fish Food, Nutritionally Balanced for Tropical Fish
Cám nổi classic cho cá cộng đồng nước ngọt — cá nhỏ đến trung bình.
Omega One Super Color Flakes Fish Food
Cám giàu omega-3 — màu sắc cá tự nhiên, chất lượng cao.
Budget nano under $50 — Nano fish roundup — link to species guides, not big cichlids in 40 L
FAQ
Best nano fish for beginners?
Neon tetras, ember/chili rasbora, guppies on cycled tank.
Best with cherry shrimp?
Neons, rasbora, otos — not angelfish.
How many in 40 L?
One school (6–8) plus shrimp or small cory group — don't overcrowd.
Otos in nano?
Yes if tank mature 8+ weeks with biofilm.
CPD nano?
Yes — celestial pearl danio for 40 L+ planted.
Can I keep ram in nano?
German blue ram wants 60 L+ warm pair — not true nano.
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