Recently, I have fallen in love with BTS. I have been debating whether to get a savanna monitor or a BTS. I think a BTS will be a better choice. I just have one question: How big does a Northern get, some sources say 12-18 some say 22+inches. I checked on BTS.net but there was no info on how big a northern gets. Another question, will a 75 gallon be adequate for the skinks whole life.