just by looking at him it looks like he may have molars.. i just purchase prawns from the local fish markets, peel them, freeze them and thaw them out when i need to feed.
if you dont want to get a skimmer you'd probably need to do 25% water changes every 3-4 days..making sure you stir up the base to get all the yuck out..
I havent seen an eel tank without sand except at the lfs
..i have cc
substrate and i have no probs with that..just have to try and mimic their natural habitat as much as possible.. alot of rock and some type of substrate = much better than an empty tank and a PVC
Oh yeah you probably already no this but......... NO
Post pics when he's in your tank!!!
GL and enjoy the other side of marine tanks!!