Rainbows in a 90 gallon

[Dueby]

Hello!

How many larger rainbows do you think can go in a 90 gallon tank? I have 2 fluval 306 canister filters on my 90 gallon. It has plenty of plants and about 11 corys and one hillstream loach. Thank you for the advise.

 

[ZxC]

Depends on your water change schedule really,

I would think a decent starting number is 10, assuming the tank has a 4' x 18" footprint and a 50% weekly water change.