I feed everyday, 1 frozen cube of either squid or mussel, thawed out and 1/4 seaweed sheet.If I skip a day I feel aweful. As for the fluval yes it has the 4-sponges, 1 tray w/ prefilter media, 1 tray w/ Chemipure Original, 1 tray w/ biomax speres. I'll be honest I dont open it often maybe every...