how much live rock?

[sanker]

I need more live rock for my 90 upgrade.
http://bostonreefers.org/forums/showthread.php?t=11376

I think I have around 60lbs. How much do I need? 1.25 to 1.75 lbs/gallon? Do in include the sump? I think my sump level (75 baffled down 4") will be about 60 gallons.


so, 112-157. I guess I'm looking for 60lbs to start.

if I include the 60g for sump, I need 75 more.

(also posted in marketplace looking for 60lbs)
-Sean

 

[Moe_K]

Well, there's not an easy formula, unfortunately.
The need for live rock (LR) depends on how high your bio load will be, and if you employ a deep sand bed (DSB) and a refugium.
The purpose of the LR is to provide a home for the micro-organisms (m/os) that convert ammonia to nitrite, nitrite to nitrate, and finally nitrate to nitrogen gas.
These same m/os will live in your DSB.
Then, competeing for nutrients could be the macroalgae one keeps in a refugium.
So, it's all a balance. If you have a DSB and a refugium, you don't need as much LR. If you don't use either a DSB or a refugium, you're going to want more LR.
Generally, I like to use 1 lb/gal of water. I'll also chuck a bit more in my sump, and use a refugium.

 

[sanker]

thanks Moe. I was thinking of putting 4" in my fuge (22" middle section) and 2" in the display tank.

You think 90lbs would sufice? Guess I will find out if I have high Nitrate/Nitrite levels eh?

-Sean

progress:
http://bostonreefers.org/forums/showthread.php?t=11376