Just an FYI, I started with some of the more dense rock. Not all of it, but I had 2-3 bigger pieces in my tank and my sump was full of it instead of bio balls. It became one of those things that just stayed in my mind and bothered me quite a bit. After looking at it more thoroughly, I decided it was barely porous at all and have since replaced ALL of it. Again, maybe it was just me, I just feel better about not having it and knowing I have better quality rock that will be more beneficial for my tank as a whole.
Keep in mind that getting the rock with the most pores won't matter if you don't keep them clean. Lots of flow and going over them with a powerhead or turkey baster will keep the rocks healthy.
Justin
"Only bad things happen quickly in this hobby"
Phenomenal had some oystercreet man made rock that was $3 a pound. It looked pretty good and had some nice shapes too.
I refuse to join any club that would have me as a member.
Groucho Marx
I checked out the pukani rock and liked it. I decided to get what I need now instead of worrying about it later. Thanks everyone! If I hadn't got yall's advice I would of had a tank full of crappy rock and wondered why things weren't working right! I have a koralia 4 power head and a quiet one 1000gph pump so I think I have enough water movement. I had it set up for tropheus up till a week ago.