Stocking A 20 Gallon

Katie13

Instead, I would add 1 more Cory, 6 neons, and 6 harlequins.
 

maggie thecat

The baseline for schooling /shoaling fish is six, so in a 20 gallon, as long as you are going with light bioload fish like tetra or rasbora, you could do 12 harlequins or six and six combined with tetras, plus the six cory and your snail.
 

TexasDomer

In a 20 gal high, I would only go with one schooling fish in the mid/upper levels, either 8-10 neons or harlequins, but I wouldn't do both. And I would also definitely add 2 more peppered cories.
 

maggie thecat

Funny how different tanks differ. The neons I've had have either been full tank roamers or bottom third dwellers.
 

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