I'd say a 20 gallon is OK for 2 rats *at the max*
My friend had 3 rats in a 10 gallon. I couldn't stand it so I lent her my 20 gallon. What does she do? Goes and buys ANOTHER rat! Thats 4 in a 20 gallon. I told her its to small more than once. So she asks if I would sell her my cage. I said it can only fit two comfortably. She looked at me like I was crazy. She also waits until the water and food is empty to refill it. I honestly don't know what to do...I just feel very bad for them.
My friend had 3 rats in a 10 gallon. I couldn't stand it so I lent her my 20 gallon. What does she do? Goes and buys ANOTHER rat! Thats 4 in a 20 gallon. I told her its to small more than once. So she asks if I would sell her my cage. I said it can only fit two comfortably. She looked at me like I was crazy. She also waits until the water and food is empty to refill it. I honestly don't know what to do...I just feel very bad for them.