what can i keep

Soft corals yes,clams no.Less than 3 watts per gallon will not be enough for clams.Perhaps,a T.derasa which only needs moderate light.IMO,still not enough for even those clams.
 
Keep them half way up.Start them on the sand and let it attach to a rock rubble then move them up in a week.Your system really needs to be about 3 months and stable before adding one.
 
Back
Top