just a note. It might be difficult to get a plant especially java moss to attach to wood in a pleco tank. it would have to be secured very well. I have a pleco tank with tons of plecos that i have tried to get java fern to attach to wood and it has been fairly difficult. Not to say that its impossible but it also seems that my plecs are also chewing on the leaves of the java fern because they are like swiss cheese. I do have over 10 different species in the tank so i dont know which one does this. im guessing the panaques are responsible.
Drowning