Hi all. I have kept many fish in different settings. I have always used gravel though. I got a new tank which is a 20 us gallons. I would like to try sand. I can not find information on how gto do this. I need to know everything to put it in the tank. After it does its cycle i want to add some guppies. After the tank is established i want to get some khulli loaches. I did read that a fish that stirs up the sand is good for the sand and air bubbles and stuff. Please help me if you can.