"Eric Schreiber" eric at ericschreiber dot com wrote in message
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snip
In the commercial eco-sphere products, the only plant included is
algae. I wonder if your hygro or anacharis might grow out of control in
your experiment, with nothing there to keep them in check.

Good point, I'll have to look into which insects or arthropods will eat the
plants I use.
If you have any ideas for plant / insect combinations I would be grateful.

Using pond mud should yield some interesting tiny critters - I doubt
you'll need to specifically add copepods, as you'll almost certainly
get some with the mud. The shrimp should find plenty to feed on from
the mud.

Sounds like an interesting experiment. You make me tempted to go give
it a whirl, too, though I fear the look I would get from my wife if I
suggested adding yet another little tank to my collection.

My first try was with an old catsup bottle, some plants, and some snails.
The jar you use doesn't have to be big. Maybe you could "accidentally"
"forget" you left a jar with plants in it.....

Limnophile