Oh, need watering help here. My newly potted cacti were just watered (at late night) after a week of drying period under lot sunlight and summer heat. Immediately I saw the water sinking under soil top. Next day, my cacti didn't show sign of happiness or sadness. And now two days later, all soil top look as dry as b4 watering! Although all plants look same as usual, seeing the drying soil top I am very tempted again to water them all, but not sure I should. Please advise. Thanks