if this works, i will be very VERY impressed. it never even occurred to me (and to most people i suspect) that aquaria and bonsai can be combined. you have a very innovative imagination, congrats.
Thanks so much! I will keep working on it. I think that an aspect that will be as important as training the tree will be to make a whole tank setup and placement in the dwelling that will go along with the visual idea.
My buttonbush in a riparium planter has more new buds on it and lots of new roots in the planter. I should get another picture of it.
I will also have some swamp rose (Rosa palustris) plants coming in the mail. I hope that it will be possible to grow roses year-round inside(?). I have seen roses growing and blooming in hydroponics for several years straight. Bonsai-training roses and similar bushes is not the same as training trees. It looks like the trick is to instead select a plant with a nice trunk base, cut it way back, and then let a few branches re-grow with the natural branching pattern. There are some nice shots of bonsai roses in this thread at ibonsaiclub...
Here's another plant I hope to get pretty soon. Arundinaria tecta "river cane" is a true bamboo native the the Southeast US that grows in river bottomland swamps. I have see some pretty nice bamboo bonsai and I hope this plant will work out.
I see new white roots in the planter for the sapling Montezuma cypress. This is pretty exciting. The foliage still looks good as well. The leaves up near the light fixture have developed a reddish hue.