How often would you have to clean a 1.5 with shrimp? Seems like it would be hard work to put together all the time!!
Google "Walstad aquarium" to get a general idea of how something like this can be accomplished . It can even be done with fish, provided you stock very lightly. I had a nano with a few cherry barbs (and later, celestial danios) that required no maintenance besides the very occasional top-offs. I actually miss that tank and will probably do one like Sharni is doing when I move...cherry shrimp rock .wow, it looks so nice! I was thinking maintenance, like to dump water and clean things in it without a filter. But I know you know more than me! It looks awesome, and I'd love to see updated pics ^.^
It can work with sand depending on the plants used. With non-rooting plants like java ferns I don't see why not.That is so neat! I just googled Walstad Aquariums, and I seriously want to make one! I have way too much extra Java moss and fern anyways.
Will they work with just sand? I was reading that you needed soil and stuff under it. If I made one I would probably just use sand and water for my ACF's tank, since it is really established.