Hey John I may be abandoning the 10 gallon with the dwarf seahorses depends on how you advise me to handle what to me looks to be crowded now. I started with 30 dwarfs 11 days ago in a 10 gallon tank. However 11 days later i'm somewhere between 70-80 with 5 more pregneant males. All the info I find goes upto 20 gallons on how many to keep in tank however the articles say anywhere from 15-40 in a 20. So since answers vary alot figured best shot was to once again ask for your expertise. Here is what i'm currently considering I got a 55 that just has saltwater circulating in it I use it to keep 55 gallons of water mixed for water changes however i'm thinking get 110 pounds of your sand, 55 gallon snail pack, and macro algea that you suggest would be best to try with reef capable led light. Rock though I'm kind of torn on thinking 1.5 lbs. per gallon of either your rock or premium liverock from liveaquaria.