I never saw someone folding this model with a foil.
I just think you should use Methyl cellulose, that might work, give it a touch of wet folding +MC.
Good luck, i am planning to fold it too, very soon
by the way, anyone know if the diagram or crease pattern for the first version of the Aquarius is published ??
i really like it, even more than the last version.
here is the link http://origami.gr.jp/~hojyo/107aquarius.html