Hi all. I'm new to the list and I am wondering how to deal with an outbreak of alien things in my planted tank, which I just recently found out are hydra. Any general info about what they are, what they eat, how to starve/kill/demoralize them, etc... would be great. Or website links. If this issue has already been talked to death, please feel free to contact me offlist. thanks! Bill bpabst at asha_org