I have kept Fire Belly Toads on and off for over 25 years, and despite my efforts, this is the first time I have seen tadpoles. The tank is in my greenhouse, which pretty much follows the seasons here (New York) but is heated enough that it doesn't go below about 45 in winter. The tank is overgrown with Pothos and Java Moss, and the water contains a population of blackworms and various pond life. Stems and moss stick above the water level in many areas. Besides removing the adults, what else should I do? Anything?