vapor (steam) was the major reservoir of oxygen, gaseous methane was the major reservoir of carbon, gaseous ammonia and molecular nitrogen were the reservoirs of nitrogen, and H$_2$S was the reservoir of sulfur. As it cooled, the layer of alkali metals was buried below the photosphere to higher pressures, but gaseous H$_2$, H$_2$O, NH$_3$, and CH$_4$ persisted to dominate the atmospheric composition. At a  of $\sim$400 K, water condensed in the upper atmosphere and water clouds appeared. This occurred within its first 100 million years. Within less than a gigayear, when  reached $\sim$160 K, ammonia clouds appeared on top of the water clouds, and this layering persists to this day. Stellar irradiation retards cloud formation, as does a large EGP mass, which keeps the EGP hot longer. Around a G2V star like the Sun, at 5 Gyr and for an EGP mass of 1.0 , water clouds form at 1.5 AU, whereas ammonia clouds form beyond 4.5 AU[@bur.hub]. Jupiter’s and Saturn’s current effective temperatures are 124.4 K and 95 K, respectively. Jupiter’s orbital distance and age are 5.2 AU and 4.6 Gyr. The orbital distance, mass, and radius of a coeval Saturn are 9.5 AU, 0.3 , and 0.85 . 