i've had a new Haddoni for about a week now, and it still hasn't attached. Just looking for any advice/pointers. I created a depression in the 2-3" sand bed next to rocks, and it's been just sitting there. It looks healthy, is sticky, and I've got the tank flow dialed down so that it won't get blown around. Don't see any obvious signs of damage to the foot, but when I've looked at it there is always some sand stuck on it obscuring some of it. Any ideas?