My inside tank is a 100 gallon with approximately 3 watt per gallon neon
setting. I have regular aquarium substrate with bichir fish.

Yikes! That's a lot of light for a tank that size. I hope you are injecting
compressed CO2.

It can be difficult to keep plants in a tank with fish that get as large as
bichir do. They tend to uproot plants just by moving around. Something with
nice, strong roots, like Amazon swords or tiger lotuses (lilies) might be good.
But rooted plants generally like a rich substrate. If your tank is new, you
might want to put some laterite balls in the substrate, near the roots of the
plants.


Leigh

http://www.fortunecity.com/lavender/halloween/881/