Here is the Tropica list of plants that accept brackish water:
Quote:
Aponogeton crispus
Bacopa monnieri
Cladophora aegagropila
Crinum calamistratum
Crinum natans
Crinum thaianum
Cryptocoryne pontederiifolia
Cryptocoryne wendtii 'Mi Oya'
Glossostigma elatinoides
Lilaeopsis brasiliensis
Lilaeopsis novae-zelandiae
Microsorum pteropus ''Narrow''
Microsorum pteropus ''Undulata''
Microsorum pteropus ''Philippine''
Microsorum pteropus ''Red''
Nymphaea lotus (zenkeri)
Samolus valerandi
Shinnersia rivularis
Spathiphyllum wallisii
Vesicularia dubyana
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Note the african fern (Bolbitis heudelotii) is not on the list. I have this plant and can tell you it loves being placed where there is current. If will also grow much faster with co2 added. For a 10 gal tank I would start with Flourish Excel rather than diy co2. If the Excel doesnt do the job, then consider diy if you can to add co2.
As for planting, it is OK to put the roots of ferns and anubias in the gravel as long as the rhizome is left above the gravel. If the rhizome is buried, it will rot and the plant will die.