That would be 72 watts... is this enough? I don't want
to go overboard because I don't really want to get into adding CO2 right now.

I would really appreciate any suggestions anyone might have!

72 watts is not too much for a 38 gallon tank. It's less than two watts per
gallon. It's probably a good level to start with, if you don't want to inject
CO2.







Leigh

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