both tanks have over 100# of live rock.dsb,sumps,pumps,vho,twin 250 mh,lots of extra lighting,chemicals,test kits,filters,ect.the 100 has a 40 gal sump and Lalo rock.the 75 has a 20 gal sump and gulf coast rock.i would take 500 and 600 or 1000 for both.i am moving and any reasonable offer will be considerded.thanks for looking.Pauly

