having kept fish for years, i was already convinced that at the end of the world there will be cockroaches and algae. now the lovely green goo has invaded my drosera seedlings' pots. (D. capensis & D. capillaris) will this harm my plants? it's been spreading pretty slowly, of course the darn stuff loves the same conitions as the plants and i hate using any chemicals to get rid of it. any solutions?