Thanks a lot. Well my fish dont splash at all so I guess it will be ok without plexiglass?? I think I may just put my light right over the water. A lot more of it makes it into the tank. Ill prolly just grab another hood like the one I have and have two on there. Unless you can suggest something cheaper from Lowes or Home Depot? As for substrate, I want to keep my brown gravel and stay brown. Which one would mix well and work with the discus? Any suggestions on rearranging the tank (moving the driftwood, plants, etc.)?