Neon Tetras And Guppies In 30G

[seancotterill]

Hi,
I have a well planted 30g cycled fish tank with 2 air filtration systems and a 500L external canister filter. I was wondering if my take could take 25 guppies and 30 neon tetras.

 

[ZoddyZod]

that's packing them in a fair bit in a tank that size, although the cansiter filter sounds like it could handle the biomass. If it could handle it, you'd probably be looking at quite large and more frequent water changes to keep the nitrate levels down.