Interesting idea with the drip irrigation manifold, I never really thought about that one. I spend about two hours a week at Lowe's wandering thinking about ideas for my tanks and I always end up at the irrigation area, i'll have to spend some time tinkering there this weekend.
I have been thinking about this for my 100 gallon tank, on a self behind it, i was thinking bare roots but the profile might do the trick. I've been having horribly nitrates in that tank. If it works i have two more tanks i could give it a shot on
I had some peace lillies in my vivarium that grew so well i had to split them twice and they were just planted in gravel to act as a filter for some newts and a frog. In time I could see yours needing some splitting as well