Since I've downsized and redone my entire collection, I'm taking extra care and caution to grow my plants right, especially when it comes to my Neps.
To this day, I've never quite managed to "get" Nep watering. My latest method is this: I keep all my Neps in terrariums with indiviual water trays under each. Each water tray can hold no more than an inch or two of water at any given time, so after I water it's usually that deep. I'll typically let my plants sit in the water until it evaporates (within the week usually) and wait to water again until the medium is a tad bit dry.
My Neps don't seem to mind this method so far, but I want to hear all of your takes on this. I really would like to hear from growers who have Neps in tanks since this is how I grow mine.