I have a 20 gallon long tank with 1 male and 2 females. I believe its adequate, however, i like to spoil my animals so i will soon be upgrading them to a 30 or 40 gallon breeder tank
Yes, I use the general rule of one leo per every 10gallons... I know that some people probably do put three in a 20G and Im sure that can work and that its fine, but for me personally, I prefer two in a 20G. =] Hope this helps.