Molly

Molly

Poecilia sphenops

Needs high hardness and slightly alkaline water. Pairs well with coral sand. A big load, and it grazes algae well.

Temp 23~29°CpH 7.2~8.5GH 12~30Adult 8 cmGroup 3+Min. tank 80 L · 60 cm+ longSwims middlePrice $1.07

How many fit in each tank?

The largest group where none died in 90 days. Tap water · coral sand · bacteria starter on day 1 · fish added on day 10 · 25% weekly water changes.

It likes hard water (high pH and hardness). This was calculated with coral sand to harden the water.

30 cm cubeNot recommended — needs 80 L or more
45 cm standardNot recommended — needs 80 L or more
60 cm standardNot recommended — needs 80 L or more
90 cm standard
7
120 cm standard
8
120 cm large
11
Run a 90 cm standard tank with 7 yourself →

Don’t keep with

The same rules the engine uses for tankmates.

Eaten by

Oscar

Bullied by

Yoyo LoachAngelfishElectric Yellow CichlidKribensisSaulosi MbunaRed-tailed Black Shark

Water doesn’t match

Neon TetraCardinal TetraGreen Neon TetraBlack Neon TetraRummy-nose TetraLemon TetraEmber TetraCongo TetraSerpae TetraSilvertip TetraHarlequin RasboraChili RasboraLambchop RasboraSparkling GouramiChocolate GouramiSterba’s CoryDwarf CoryKuhli LoachClown LoachOtocinclusDiscusCockatoo CichlidGerman Blue RamUmbrella CichlidClown KillifishCrystal Shrimp

Good tankmates

No eating or bullying either way, with plenty of overlap in temperature and pH. Fish that swim at a different level come first.

Medaka (Rice Fish)Nerite SnailMalaysian Trumpet SnailBolivian RamEndler’s LivebearerRamshorn Snail

The numbers on this page come from the Water Kiwoogi simulator model; real tanks can differ.