How about making small overflow boxes, could add some sort of filtration in them too. Could save you moisture/evaporation problems. You could possible have a decent pump at the last/bottom tank that would divert it into wet/dry or straight to the top.
Like someone said earlier, I think it's more about the construction of the stand. If you are looking for the cascading-into-each-tank look, I'm sure you're going to have to fabricate some lip/spout for the four upper tank levels.
Keep generating those "cooky ideas". But ease off the crackpipe. j/p
Anyways good luck with this, very interesting. This set up would be pleasing to watch.
Like someone said earlier, I think it's more about the construction of the stand. If you are looking for the cascading-into-each-tank look, I'm sure you're going to have to fabricate some lip/spout for the four upper tank levels.
Keep generating those "cooky ideas". But ease off the crackpipe. j/p

Anyways good luck with this, very interesting. This set up would be pleasing to watch.