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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 385 - 408 of 736 Guides

Cardinal Tetra

Paracheirodon axelrodi

Characins
Strong Fit
4 cmPeacefulMid-level55 L min

Redline Rasbora

Rasbora pauciperforata

Cyprinids
Strong Fit
7 cmPeacefulSurface, Mid-level80 L min

Yellow Acara

Aequidens metae

Cichlids - South American
Strong Fit
18 cmSemi-AggressiveMid-level, Bottom200 L min

Uruguayan Eartheater

Gymnogeophagus australis

Cichlids - South American
Strong Fit
14 cmSemi-AggressiveBottom, Mid-level200 L min

Threadfin Acara

Acarichthys heckelii

Cichlids - South American
Strong Fit
20 cmMostly PeacefulMid-level, Bottom250 L min

Red Striped Eartheater

Geophagus surinamensis

Cichlids - South American
Strong Fit
25 cmMostly PeacefulBottom, Mid-level250 L min

Red Hump Eartheater

Geophagus steindachneri

Cichlids - South American
Strong Fit
15 cmSemi-AggressiveBottom, Mid-level200 L min

Zebra Obliquidens

Astatotilapia latifasciata

Cichlids - African
Strong Fit
12 cmAggressiveMid-level, Bottom200 L min

Rainbow Snakehead

Channa bleheri

Oddballs
Strong Fit
20 cmAggressiveSurface, Mid-level, Bottom110 L min

Skunk Botia

Yasuhikotakia morleti

Loaches
Strong Fit
10 cmAggressiveBottom150 L min

Redtail Splitfin

Xenotoca eiseni

Livebearers
Strong Fit
7 cmSemi-AggressiveSurface, Mid-level110 L min

Redbreast Sunfish

Lepomis auritus

Other
Strong Fit
20 cmAggressiveMid-level, Bottom280 L min

Pumpkinseed

Lepomis gibbosus

Other
Strong Fit
20.5 cmAggressiveMid-level, Bottom280 L min

Orangespotted Sunfish

Lepomis humilis

Other
Strong Fit
10 cmSemi-AggressiveMid-level, Bottom75 L min

Longear Sunfish

Lepomis megalotis

Other
Strong Fit
18 cmAggressiveMid-level, Bottom208 L min

Green Sunfish

Lepomis cyanellus

Other
Strong Fit
25 cmHighly AggressiveMid-level, Bottom280 L min

Spotted Gar

Lepisosteus oculatus

Oddballs
Strong Fit
90 cmSemi-AggressiveSurface1200 L min

Reticulated Stingray (Teacup Ray)

Potamotrygon orbignyi

Oddballs
Strong Fit
65 cmMostly PeacefulBottom680 L min

Yellow Convict

Cryptoheros nanoluteus

Cichlids - Central American
Strong Fit
10 cmSemi-AggressiveMid-level, Bottom80 L min

Salvini Cichlid

Trichromis salvini

Cichlids - Central American
Strong Fit
22 cmHighly AggressiveMid-level, Bottom208 L min

Yellow Peacock Cichlid

Aulonocara baenschi

Cichlids - African
Strong Fit
13 cmSemi-AggressiveBottom, Mid-level200 L min

Xenotilapia papilio

Xenotilapia papilio

Cichlids - African
Strong Fit
10 cmSemi-AggressiveBottom110 L min

Xenotilapia ochrogenys

Xenotilapia ochrogenys

Cichlids - African
Strong Fit
11 cmMostly PeacefulBottom200 L min

Yellow Sand Cichlid

Xenotilapia bathyphilus

Cichlids - African
Strong Fit
10 cmMostly PeacefulBottom110 L min