I have three types of Neps. I have N. Ventricosa and two others just can not think of the names right now. The two that I have questions on is the N. Ventricosa and ?? *I will have the name shortly* the lids die after two weeks. I have my neps in a ten gallon tank with just a crack so air can circulate around.
During the 24 hour period in a day, there is water on the walls so I do not think it is humidity. Any ideas or are the lids suppose to only last two weeks or so?