The Shark Reef is a great place, but none of those animals are compatible with dwarf seahorses. In fact, in a 10 gallon tank, you can have alot of dwarf seahorses, they grow no larger than 2 inches. Additionally, they must be fed live baby brine shrimp on a daily basis. The burping isn't always necessary unless the seahorses has contracted daily. Seahorses are supposed to have the ability to flush out their pouches. However, it's recommended that airstones aren't use with them.
Keep in mind that because live baby brine shrimp need to be fed to the horses on a daily basis, there's a good chance hydroids will develop, which are deadly for seahorses. That's the reason why most people start out with a more "sterile tank" without live rock, live sand, or macroalgae.