Sorry to be a downer here, but I don't see a small aro living through a nitrogen cycle, once the ammonia spike comes he'll be lucky to make it through that. Pops is giving you advice to keep the water where he'll be ok, but you'll have to do it everyday due to lack of beneficial bacteria and it'll get old quick for you most likely. And most people start with a 55 for a aro and find that's to small within a few months. I got one the 6-7" and within 7 months it grew to 14-16".