Have your water conditions changed? Hardness / pH ? that might explain why he is leaving the plants alone now.
nope, everything is the same as far as ph and hardness. the only thing i could think is that we did move in early february and it ended up being a lot more stressful on the oscar then i had anticipated. he was not in great shape when we got to the new house (3hr drive), so i don't know if the whole move had anything to do with it, i don't see why it would, but i added the plants like 2 weeks later and he never touched them.
the only other thing i can think is that he's been fed NLS pellets exclusively for about 18 months now. maybe oscars rip up plants and eat everything else in their tank because they are lacking in nutrition that other staple foods are lacking? i have noticed he is far less agressive and more calm since being on NLS, but he's also gotten older and bigger in that time as well so who knows...

