Bullseye Catfish
Horabagrus brachysoma
Catfish
45 cmSemi-AggressiveBottom, Mid-level450 L min
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Water Onion With Fish Guides
These pairing guides focus on how Water Onion handles real fish pressure, shared water conditions, and the practical layout needs that matter in a mixed planted tank.
PlacementBackground
LightModerate
FlowModerate (Standard)
Water TypeFreshwater Only
Showing 217 - 240 of 736 Guides
Strong Fit
African Pike
Hepsetus odoe
Characins
30 cmAggressiveSurface, Mid-level680 L min
Glowlight Tetra
Hemigrammus erythrozonus
Characins
4 cmPeacefulMid-level40 L min
Penguin Tetra
Thayeria boehlkei
Characins
6 cmPeacefulSurface, Mid-level75 L min
Diamond Tetra
Moenkhausia pittieri
Characins
6 cmPeacefulMid-level75 L min
Emperor Tetra
Nematobrycon palmeri
Characins
5 cmPeacefulMid-level75 L min
Norman's Lampeye Killifish
Poropanchax normani
Killifish
4 cmPeacefulSurface, Mid-level38 L min
Florida Gar
Lepisosteus platyrhincus
Oddballs
80 cmAggressiveSurface, Mid-level1100 L min
Wrestling Halfbeak
Dermogenys pusilla
Livebearers
7 cmMostly PeacefulSurface55 L min
Glass Catfish
Kryptopterus vitreolus
Catfish
8 cmPeacefulMid-level110 L min
Red-Bellied Piranha
Pygocentrus nattereri
Characins
30 cmAggressiveMid-level, Bottom380 L min
Gertrude's Spotted Blue-eye
Pseudomugil gertrudae
Rainbowfish
3.8 cmPeacefulSurface, Mid-level38 L min
Congo Tetra
Phenacogrammus interruptus
Characins
8.5 cmPeacefulMid-level, Surface110 L min
Red Rainbowfish
Glossolepis incisus
Rainbowfish
15 cmMostly PeacefulMid-level, Surface200 L min
Endler's Livebearer
Poecilia wingei
Livebearers
2.5 cmPeacefulSurface, Mid-level19 L min
Neon Tetra
Paracheirodon innesi
Characins
4 cmPeacefulMid-level38 L min
Pygmy Rainbowfish
Melanotaenia pygmaea
Rainbowfish
5 cmMostly PeacefulSurface, Mid-level75 L min
Parkinson's Rainbowfish
Melanotaenia parkinsoni
Rainbowfish
13 cmPeacefulSurface, Mid-level200 L min
New Guinea Rainbowfish
Melanotaenia affinis
Rainbowfish
11.5 cmPeacefulMid-level, Surface110 L min
Lake Eacham Rainbowfish
Melanotaenia eachamensis
Rainbowfish
7.5 cmPeacefulSurface, Mid-level110 L min
Kamaka Rainbowfish
Melanotaenia kamaka
Rainbowfish
8 cmPeacefulSurface, Mid-level110 L min
Fly River Rainbowfish
Melanotaenia sexlineata
Rainbowfish
7.5 cmPeacefulSurface, Mid-level110 L min
Neon Green Rasbora (Kubotai)
Microdevario kubotai
Cyprinids
2 cmPeacefulSurface, Mid-level38 L min
Bleher's Rainbowfish
Chilatherina bleheri
Rainbowfish
12 cmPeacefulSurface, Mid-level200 L min