7 or 8 with the Otto's. You may be able to pull off 10 but I found that they are somewhat messy and active. In a 20L its definitely doable.
Black Widow Tetras
How many of these tetras could I stock a 20 gallon tank with? I was shooting for 10 with 4-5 ottos.
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IN a planted tank i could see easily 10 mabey say 13. Otto's have a very small bioload so mabey 5 ottos 11 black widows or say 4 ottos 13 black widows. IN my old 20 gal i had a pair of rams,3 neons, 4 black widows,2 prestillas, 6 amano shrimp, a common plec, a yo yo loach, a clombian redfin tetra, and 2 silver tipped tetras. So trust me if you do weekly waterchanges and the tank is planted well you shouldint have a problem. What kind of filter are you planing to use ?
I run an aquaclear 30 and a smaller filter filled with filter floss for polishing.IN a planted tank i could see easily 10 mabey say 13. Otto's have a very small bioload so mabey 5 ottos 11 black widows or say 4 ottos 13 black widows. IN my old 20 gal i had a pair of rams,3 neons, 4 black widows,2 prestillas, 6 amano shrimp, a common plec, a yo yo loach, a clombian redfin tetra, and 2 silver tipped tetras. So trust me if you do weekly waterchanges and the tank is planted well you shouldint have a problem. What kind of filter are you planing to use ?
Yeah then you should be fine ith 10 maybe 11 with that filter. They are very active IME and they arent that great for 20H but for a 20L they are awesome.I run an aquaclear 30 and a smaller filter filled with filter floss for polishing.
Yeah mines a 20 high. Maby I'll just go with 8.:smile:Yeah then you should be fine ith 10 maybe 11 with that filter. They are very active IME and they arent that great for 20H but for a 20L they are awesome.
Well with the filtration I would try 10. From my experience they always seem to want more vertical swimming space. Alot of schooling fish are that way. Just plant heavily and enjoy them. I think the 10 will deifnitely be fine in there with enough plants, open ceter and foreground, snd good filtration.
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