I finally found some java fern in my LFS. I've read this is a really hardy plant, which is good since I've never tried live plants before. I also read the roots will attach to rocks, etc. How should I get them started? Right now I have them in the front of the tank where there is open gravel so that they are weighted down. Is there anything I should know about keeping the plants healthy? Thanks for any info and I'll have some pics very soon.