I wanted to know, for my first salt tank, if I could use sand, live rock, and macro algae from the ocean by me. I went today at low tide and found tons of porous rock with pink coralline algae all over it, and lots of live nassarius, cerithium, and macro algae. Could I use all this? Nothing harmful right? The only thing left is water, which i think i could take with a couple 5 gallon jugs, especially for a small tank like a 20 long. 