I'm just about done with a fishless cycle on a new tank and then all of a sudden all these worms started hatching. The only things in the tank are a piece of that expensive Malaysian driftwood you see in petshops (which I boiled before putting in tank) and gravel (which I previously cleaned in hot water). I double dosed the tank with Copper Safe but that didn't seem to slow them down any (they cont'd hatching). Now I've been double dosing every other day with Jungle Parasite Clear but they're still around. At any one time there's about 3-6 of them either alive or dead circulating around the tank. I've also noticed that the ~1cm worms are most likely parasitic since I've seen them attach by their heads to the driftwood. Of course, I don't want to add fish to the tank, but I also don't want to start again from scratch. I've been thinking of removing the biowheel and storing it in another tank in order to keep the bacteria alive, and then REALLY overdosing the tank. Does anyone have any suggestions?