haha i know my favorite plant isn't aquatic! ... that's how i was "duped by petco" thank you for the info on the java fern tho.. i will promptly get it out of there and tie it on to some larger rocks. i've been thinking about slowly covering my pea gravel with sand.. i think i like the look of sand better but i don't want to kill off my bio filter.. any thoughts?
The sand will eventually filter itself down beneath the rocks. You won't be able to keep that look for long.
JB is right, Stephen. What you could do to switch your substrate is bag up a large amount of the gravel into media bags or knee-high pantyhose. Put the sand in as you want it to be.. then just place the gravel bags in the tank for a week or two (on top of the new sand layer). It's best to position them near the strongest flow from your filter.
This will let the old gravel seed your new sandbed with beneficial bacteria. Later on, just remove the gravel bags and it's done.