I meant it just as an example..
And i'm growing a Cyperus sp. in the garden emersed a metre high.. Just try to give a maybe valid alternative other then search for trees.
As said in my search for plants came across nurseries using and advising dried sedge as a substrate to grow certain difficult plant sp like utricularias. It seems to work beter than peat with simular propperties, adding tannins and beneficial acids, antseptic, prevent fungal growth, beneficial for microbiological development becaus it is perfect food for rotifers etc. It does everything what a dried almond or oak or beach leave does to our tank water.
All this information made me think and scratch meself behind the ears while adding almond leaves to the tank while growing sedge in the garden and some even grow it in their tanks. There aint realy much info to be found about this subject in aqaurium use other then leaves from terrestrial trees. So it kinda contradicts a few common practices in the aquarium hobby, like cutting away dying leaves and dispose it, even cutting away healthy tissue and dispose it. And them run into the forest to collect dead leaves to put in the tank.
Mean while what we dispose of could have the same propperties.. If so, then what the hell are we doing here? Having a run around?
I'm as unsure as you are in this, but since you brought the issue up i thought why not share it and maybe find out what others who know more about the subject think about it.