how about something out of the ordinary. ive read that peopel are using cryptic zone and putting stuff like partitions for aiptasia to grow and sponges. as for voting im not sure which one as it confuses me lol
I voted Miracle Mud HOB and refugium for sump. I personally would never have Miracle mud as a substrate in any tank; remember that it will need to be changed a year or so down the road, when it's binding capacity has been maxed.
I also think that a ten gallon is not big enough for a DSB. Remember that they need to be at least 8'' deep to be effective. You would just have a big tank full of sand and nothing else. Where would you even put the pumps?