Wonder what are the dimensions of your tank? It's a 67g right? And what size koralias are those? my 50g tanks are 36x18x18 and I have a heck of a time doing flow in them w/o either being too little or blowing crap all over the place. I got some macro growing in there now so it's slowly starting to take shape! I've got some small grape calerpa, feather, and just added some sargassum from reefcleaners.org last week. All these algaes are doing ok but not taking off tremendously fast. I put some codium in there too which mysteriously disappeared over night.. I think I can thank a small mithrax for that one! Anyways, if I could find out what you're using for pump there that'd be great, thanks.