im seting up a litle 30 liter tank for some sticle backes what would the best substrate be, decor E.G. :)

I've never had sticklebacks myself. I suggest searching the internet for information. I have a small section on them with lots of links at http://www.fishpondinfo.com/misc2.htm#stickle

ive heard of them in a few of my books. what kind of stickle backs? i think it should have a bigger tank.