40 watts of light will not be very effective on a 32 gallon tank. The first thing I would do is try to increase that to at least 55 watts, which can be done with an AH Supply kit. And, as much as I enjoy vals I wouldn't use them or Egeria Densa, since both are sensitive to Excel. If you do go to 55 watts with an AH Supply kit, you should be able to use almost all other plants, except those specifically needing very high lighting. The best plant guide I know of is at: http://www.aquaticplantcentral.com/f...c/plantfinder/.