To answer this question, rocks. Lots of rocks. The soil will compress and shrink down so be ready to add more. I have big rocks for structure, then gravel for filling (plus soil).
I have a handfull of ember tetras in there. They're ok, but I just found out a local shop has a decent selection of rasboras and other micro fish. I wish I had seen them first!
Yeah, those things are like the drunken sociopathic bulldozers of the aquatic world. It'll shred the plants, level that hill, climb out and shred the land plants, kill your toad, kill the fishes, and probably climb out and die in some corner of your house.
You could get a Dwarf Orange Crayfish, they're pretty mellow. Just like a shrimp but a crayfish. I'd advise against a crayfish any larger, mine destroyed every plant, ripped my snail out of its shell, pushed the driftwood into my barb (killing it), then climbed out and decimated my Lucky Bamboos roots, dropped back in and ruined part of my Mangroves roots, then for the final she climbed out crawled around under my bed, onto my bed, and then finally decided I'd be delicious. :icon_lol:
Ah yes the majestic freshwater crayfish. Will experience more in its life than all the fish in the tank combined!
Newts or fire bellied frogs would be fine and go in and out of the water. Don't get a turtle, they'll wreck it and make a mess.
