theyre just java ferns and java moss, so there is no need for any special ferts or anything like that.
as far as heating, it is 75 degrees all year round out here, so i dont use heaters ever. lol.
i change the water pretty often just because its so easy. but i am also adding ammonia to the tank to cycle it, so that when the shrimp go in, the system is stable.
if youre just doing plants, you shouldnt have to change the water often at all (if ever)