Rock density questions

[kgoldy]

Tomorrow starts the BRS group buy that paneubert organized, with 71 members of N-R (and probably other forums). I'll be looking to buy dry rock for my new 75RR.

Just last night I watched a new BRS TV video that raised some questions about what rock (or combination of) that I should choose. Watch the video here

The 12 lb Pukani rock shown in the video is gigantic compared to the Eco Rock and Dry Figi. I would need substantially less rock to fill my 75 than the other two choices I listed above. I think it looks a lot more interesting than regular figi, and I'd say it's a close tie with the eco rock, since it appears to be so easy to aquascape.

So my question is: Does the low density of the Pukani negatively affect the denitrification process?

 

[fishman1069]

I was always told "the more porous the rock is, the better it is for anaerobic bacteria to grow inside the rock."

 

[kgoldy]

Yeah, I 'm just wondering how porous is too porous, when it comes to rock?

 

[Og Drogon]

Where can I order dry rock at??? I'm almost ready with my 90g to start with the rock work ...

 

[NYreefNoob]

i love marco rock myself, not as much their new rock but the old stuff was very light for the size and had a ton of surface area. the more surface area the better and you cant go to porous

 

[kgoldy]

There are tons of places you can get dry rock. This is the place I'm talking about... It's free shipping if you go over $175...

http://www.bulkreefsupply.com/store/products/eco-rox-fiji-dry-rock

 

[Imbarrie]

And yes, the lower the density, the more porous, the more de-nitrifying bacteria can be established. The Pukani stuff looks nice but how much are you going to order for your 75?

 

[kgoldy]

There are guys on the review section who say order half a pound per gallon since it's so light. Watch the video, it's got a lot of volume for it's weight. I may order too much off the stuff on purpose, then bjust sell what I don't need on here. At less than 3 dollars per pound delivered, I don't think there's any way to lose.