I have had mixed success with java fern. Some people have alluded to the fact that it died because I kept it out of the water for too long during tying it to wood etc, but stuff I haven't done any harm to haven't survived either. The stuff in my CPD tank does really well, but not bolbitis or windelov. The stuff in my loach tank is looking rather sad. Now I just stick with the ones that do well, plain java fern and narrow leaf.