Tank with shallow water with a gentle slope to land, you can put in an airstone if ya like. Boil some water and throw in some lettuce for 10 mins, then toss it in the tank water, this encourages microscopic insofuria *spell, which the taddys will feed on. you could try commercial fry food for eggbearers too, and later finly ground to dust fish flakes. In Brisy i wouldnt worry about temps too much. Change a small amount of water every week, say 20% with fresh water, make sure theres no chlorine in it. Easiest way to do that is fill a bucket and let sit in the sun for few days, chlorine will evaporate out of it. make sure its not too hot from being in the sun before you add it. As long as there is food and sufficient warmth they do the rest themselves, its only when they,ve morphed that feeding becomes fussy, tiny pinhead cricks etc. have fun. Use a fry divider to separate them from goldfish if you do it that way, make sure that they can leave the water though, when they begin to breathe.