I'm in the process of setting up my first rack, which will prob be a 4' wide rack with the bottom two shelves consisting of 4 horizontal 10 gallons or 15 high for pairs and the top shelf will be 4 10 gallon or 15 high verts but i was wondering those of you that use shoplights how do you keep the temp up in the tanks? do you buy a seperate heater for the tanks? as of now i've just used the heat from cf bulbs to keep the temp up and haven't had a problem but i know shoplights don't get close to the same temp as cf bulbs so i was wondering what the best way would be to keep temps up? also if anyone can post a link to a rack system that has horizontal and vert tanks, most i've found here have the custom cube tanks (too expensive for me) and vert tanks? and i don't want to put the horizontal tanks sideways because i want it to be more of a display rack system, thanks.