[kltower]

Cpnut,

My way means the water stays clear from the plants and pots. That way the water remains clean without filtering - maybe algae will not grow since there are no nutrient.

The water flowing down the walls has two faults:
1) The water will get dirty through the contact of pots and media.
2) Believe me your plants can get pretty wet. I used to have a small terrarium filled with an inch of water. The plants sit on those grated plastic (used for under gravel filter). I have an ultrasonic mist generator (UMG) to generate mist. The plants close to the UMG got really wet from the spills.

Highlanders like wet environment. If you have stayed at Cameron Highlands/Genting Highlands, you will notice the grass are very wet in the morning. In the highlands you also have rain a few times a day. And if the rain don't provide the high humidity, the mist does.

KC,
The volume of water needed chilling is small. So a lower temperature can be achieved.

Choong