Buying sand & Super glue/coral question!!

[OCDP]

Happy monday morning reefers. not

Just a couple quick questions for you guys. I am switching my horribly chunky crush coral substrate to the oh so popular white sand... now, I already have suggestions on removal.. if any one has any other tips, I am all ears. I just was curious; where do I purchase this type of sand? And I do not think I am going to need a lot at all... 20g tank, with only an inch and a half of sand. No DSB for me. So where can i pick this stuff up? And generally how much am I looking to pay for the sand?

Secondly, I have some corals and a frag that do not stay put... I need glue. What kind of glue should I buy? Are we talkin' regular "krazy glue" ? If so, how does this work? Do i stick the end of the coral out of water, leaving the polyps still in water.. and dab the bottom with glue, then find my rock and hold them together? How efficient is this?

Sorry for the ramble.
Scott