Humidi-Grow trays are
useful & versatile. As their name implies, they release humidity into the
air. This is great for both the bonsai & the moss.
The grid is removable,
and if your bonsai pot is shallow enough, you can
add a little plant food to the water.
When it's time to water, lift up the grid,
and sit the bonsai pot into the water. When done, replace the grid and the
excess drips back into the tray.
Humidi-Grow Trays are available in six sizes. I recommend them