That's fine then but I would vary the diet as much as possible for best results. The temperature is one of the important part of horned frog care, so the sooner it can be sorted, the better. The book will really help you. If it is a fantasy horned frog, this is mixed with a cranwelli and tropical cornuta, so may need at least 70% humidity. Best kept on coir (eco earth) with some sphagnum moss ontop, pressed down well to prevent any risks of impaction.