So my 8-year-old's 10-gallon tank is up and running, now my 5-year-old wants a tank of her own. For cycling purposes, would it be better to use water from the established aquarium? Also, how does one transfer "mature media" from one tank to another to speed the cycling process along? The second tank will be a 5- or 10-gallon tank starting with a betta and then adding a couple compatible species once the cycle is complete.








