Thank you, yeah so I have 2 water lilies, water hyacinths, and lots of more plants, 2 dojo loaches, and pest snails but I don't know if they are still there because of the loaches. I would say that the ecosystem is pretty good. I mean it handles a bunch of decaying leaves with a small diy solar filter. I am just worried that there could be something in the wood that is maybe dormant or something that will grow and hurt the fish.