hi guys, i just got a hammer from my roomate as a present. i had a few questions regarding what to feed it and how much light and current it would like. also, i am posting a pic of it to show the condition it came in, its half full on the rock it came on. the guy at the store told my roomate that it would grow into and fill the rock. i hate when lfs owners lie to sell things... any thoughts or suggestions? thanks