Why wold you skip the pond
Specialy with thouse? A heated pond would increase their life quality they love to swim
But like any other animal there is no garantee that they will tolerate each other. And yes they will need a great deal of heating and mantenaince, cleaning lots of poo daily and not speaking of what would cost feeding 3 of thouse guys
Dont rush into desicions. Also dont forget all big lizards are inteligent inquisitive creatures and they like climbing into stuff and they ter apart all that is in their way. Im not seeing good prespectives on you doing several fish tanks and at the same having a big lizard free roaming. Some kind of disaster will happen. Why dont you do the whole thing as a habitat for one of thouse lizards in wich you include a heated pond were you can have some fish(put in there only fish you are not too atached to because water monitors can and will cach some
)?
