"Dave M. Picklyk" wrote in message
...
Hopefully not going too much off this newsgroup's topic: Does anyone
know
how many cardinal tetras I can get for my planted 15 gal without over
populating? I hear these guys grow bigger then the neon tetras. Right
now I
have 3 small otos, 2 bronze cats, and a beta. I think a nice school of
tetras would be a nice addition to a planted aquarium.

What do you think?

iirc Bettas & Corys both have supplemental oxygen acquiring methods,
leaving three 2" ottos. By the guidelines, this leaves 8" of capacity
(or 4 Cardinal Tetras), which is why these guidelines fall short of
reality. IMHO, with good filtration, your max might be around 25 Cards
(assuming low/mid-level moderately planted and weekly water change of
10-20%). To give yourself some margin, I would go with less than 20, but
more than 10 (for the effect). Putting a Pearl Danio in there (with
about 12 Cards) might cause the Cards to school a bit tighter, rather
than expanding to fill the tank ;o). ymmv

NetMax