Originally Posted by bettamaniac
knowing the amount of pressure that is probably in the tank I woudlnt. the maximum size I would ever put a betta in no matter what is with it is a 50 gallon.
A betta will be perfectly fine in the 100 gallon, I honestly think the pressure is a non issue. Why would a betta not be able to handle the pressure but a tiny half inch rasbora be able? Bettas will be fine in 100 gallons, and probably live longer because of the exercise. I know of someone with a betta in a 200 gallon, so it is fine. Where did you read the pressure thing? Fish are water creatures, they are built to handle it.