Well I'd plant some plants like anubius or java fern cuz they aren't very paleatable. The plant section might be able to make some better suggestions cuz I'm not a plant guy.
IMO I wouldnt switch out the gravel cuz your tank looks good plus its a pain to change gravel in an established tank.
Good stuff (and thanks again for the props

). Did a lot this w/e with the 75g:
+ Swapped out the big swords for java fern from my other tank. I plan to keep an eye out for some really big ferns to fill out the space.
--> I have some other substrate on order so might try that, but won't do a total replacement.
+ Added some more rock and driftwood and re-organized the scape a bit
--> The salvini seemed really annoyed that I deconstructed his house, but I built hm a new one
+ Tried adding in my severum again. As before, the sal started chasing and beating on him. I thought it might go a littlle different now that the sev has grown a bit, but no -- sev is still a big baby.
--> I'm thnking I may not be able to add the sev until he's got serious size on the sal -- hopefully along the way he won't start bullying his 55g tankmates.
Here are some pics. FTS:
Left:
Right:
Sal and SD's in the shade:
Sev trying to hide:
