32 Jiffy pots nicely fill one 10 gal aquarium. :) And tonite, for $20, I got a 48", 600 watt halogen shoplight! There's two, 300 watt bulbs - one for each of my two 10 gal tanks! :) I've plexi lids cut for the tops of the tanks to hold heat and moisture in, but then can let out (moisture) as necessary. green (R) (TM)