Anchors for kayaks

[GoBrowns]

Hey everyone. I got so sick of my Tracker boat dying on me, and of course loading and unloading from the trailer, that I sold it over the winter and just bought a kayak today. I'm going to give the maiden voyage in the morning. Now I have never even been in a kayak before, let alone fished from one. My question is how necessary is an anchor, and if so, how heavy should one be? I got a 10.5 foot trophy 126. I bought a little 1.5 lb. anchor with it, but wondering if I should get a heavier one. Thanks!