If you want to keep hermit crabs I would stay with the Scarlets. I have four and I have never seen them mess with anything. I have seen my blue legged hermits grow into snail killers. They would always fight with each other for their shells. I think the scarlets grow alot slower than blue legged hermits do too. If you do keep blue legs have lots of spare shells to reduce the fights. When the blues grow up I would remove them before your snails become a new condo.
I have heard of people using a buffer w/ Brasso but have never tried it. I am sure it is not a fast process. An automotive store or glass place may sell the scratch removal kits also. Just an idea.
I had bare bottom tanks for eight years before going to the DSB two years ago. So far I love it. There is not only alot more life in the tank but it looks alot better then bare glass. I have not seen much in the way of buffering help from the sand bed as I had heard about.
I had a bottomless tank one time too when I lived in FL. I dropped a big rock in my tank that broke the bottom and put 30 gallons on the floor. Something that doesn't happen w/ a sand bed.
Great info. I am sure you may have saved someone alot of stress and some corals too.
If someone does not know about them try this link. Has some nice pics of these guys.
http://www.reeffarmers.com/tracygraynudi01.htm
A month ago while l was in Qatar someone was looking for 150W HQI ballasts. I have returned and I found four of them in my shed if somebody NEEDS them. FREE!