ok i got hold of a 100kg sand filter what your sugestion to use for media.
was thinking calcium carbonate
Ok got my new sump going today i put 75kg calcium carb in the sand filter and 4 20lt buckets bio balls and about 3 20lt buckets of coral in the sump part also hooked up my 8ft tank to the system :) just on 4000lt now in the fish room hopefully another 2000lt by December
calcium carbonate sand for aficans is excelent