Starting a Marine Tank? Here's how: Put the water to the tank (RO better) then put some saltmix to achieve proper salinity. Make sure you aerate the water and let the pump run for at least 3 days to properly dissolve the salt. Add live rocks then add sand. Live rocks go in the tank first then sand so that the LR does not tumble over. Siphon any dirt if you see them so … [Read more...] about Steps in Starting a Marine Tank