GET SOMETHING LARGER TO KEEP THE FISH IN. 5 gal is no way near large enough for a pair of gourami. Especialy if you plan on breeding them. If you are gona use this "pond" to breed feeders get a 100 gal or larger stock tank, put 2-3 inches of sand in the bottom, and fill it with plants, and driftwood. Then get several doz. feeder goldfish, or feeder livebearers to throw in it.