The 10 gallon / inch is the recommended calculation on most forums although I wouldn't necessarily say you have to have that size for 2 RES. I have 2 RES in about 180 gallons with no intention of going bigger. They also share their home with some medium sized goldfish and koi.
But you should definitely be filtering it like its a 300-400 gallon.
__________________
So many ideas, so little money!
Last edited by Seriak; 10-31-2012 at 07:26 PM.
|