CRITICAL INFO FOR SAFE HUMIDITY - for all to learn from. Never ever try to raise the humidity by creating a moist / wet substrate.
Put the 'coco coir' on the bottom @Edian .. ( it is like a sponge and retains the water ) -- then put a thin layer of cypress mulch.. then your 'spag-moss'. The cypress will act as a "buffer" .. it dries out and allows your moss to stay "dry and fluffy" ! Now you simply pour water in the corners to wet your 'coir' and as the heat evaporates that water it rises UP thru your drier substrate in the form of warm humidity.
Make sense???
Put the 'coco coir' on the bottom @Edian .. ( it is like a sponge and retains the water ) -- then put a thin layer of cypress mulch.. then your 'spag-moss'. The cypress will act as a "buffer" .. it dries out and allows your moss to stay "dry and fluffy" ! Now you simply pour water in the corners to wet your 'coir' and as the heat evaporates that water it rises UP thru your drier substrate in the form of warm humidity.
Make sense???