Flatworm Infestation – P365 Mar08

These hideous creatures are a huge pest in our marine aquarium. They are called flatworms and they have overrun our tank.

They must have come in to our tank from a bought coral, and found the conditions to their liking. They are in huge numbers, and any exposed surface is about 30% covered by them. On three seperate occasions we’ve poisoned them and syphoned out all that we could see, but within a month they’re back to the same population level. We hate them, they make the tank ugly and we have no idea how to get rid of them… :(