Use fir bark, usually marketed as orchid bark in the big-box store garden centers. Any of these will do. A kind marketed as orchiata bark is longer-lasting and quite good, but the trade-off is that it is harder to find and more expensive. For Phalaenopsis, I would avoid "Phalaenopsis mix".
I think that what you are suggesting with the wood and aquarium probably will not work; evaporation would likely concentrate salts (dissolved solids) on the wood, harming the roots.
|