I have 5 Maroon clown fry that are 2 weeks old, residing in a ten gallon tank with heater and air hose. Everything seems to be going well with them, lots of rotifers, regular water changes, all parameters good. I have a new cluster of eggs ready to hatch tonight. Can I add these new fry to the existing fry tank, along with tank water from the parent tank? Or will the two week old fry present a risk to the newly hatched ones?