So I think I'm almost ready to switch my gravel out for sand. How do I go about this? Whats the easiest way to keep the sand clean? How much sand should I get to cover a 29 gallon tank? Do plants thrive in sand? My fish have eaten my plants completely within 2 weeks of getting new ones... With gravel, my new fry like to hide under it, will they still be able to hide with sand?