#ed_op#DIV#ed_cl#Hey all#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#I have a question i am going to use a 40 gal breeder tank for my sump, i was going to buy a Precision Marine Protein Skimmer Bullet 2, two sedra 12000 pumps i can see all of this and under stand that much but do not under stand what a refugium is al so i was going to put two 250 w heathers in the sump al so, should i put sand in the sump tank al so and do i need any thing els like LR#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#in the sump al so, any help would be grate.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Thanks.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# Rich#ed_op#/DIV#ed_cl#