Roaches like fish tanks for a couple reasons.
1- water and warmth. They love warm, humid areas and need the water to drink
2-food and minerals. They can feed off of any algea or food residue on the tank. They also eat any calcium or salt deposits.
The motor on your filter is a nice warm place...
java fern is a great first plant.its low light plant and its easy to grow. it does well w/ the standard floresent fixture found in most 10 gal kits. give them roughly 12 hrs or so of light a day. carbon is good to use in general.
this plant does better attached to driftwood or rock rather than...