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Old 05-18-2010, 03:37 PM   #1
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how many pounds of live rock?

i am starting a 125 gallon tank in a week or so...how many pounds of live rock do i need?? i have heard 1/2 pound per gallon all the way 1.5 pounds per gallon...just looking for some suggestions...thanks
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Old 05-18-2010, 03:44 PM   #2
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IMO 1-1 1/2 lbs per gallon
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Old 05-18-2010, 04:17 PM   #3
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Its heavily dependent on the type of rock used. You are really after volume. Weight has zero to do with it, but is used as an estimate. I dont know why sellers dont go by estimated volume? For instance, concrete is going to weight much much more than fiji rock. Porous and high volume is what you want. You may want to ask a seller how much space a certain weight takes up before you buy their rock. They usually charge you for the water weight too, so keep that in mind. I paid for 15lbs of fiji rock and got about the equivalent of 9lbs of dry rock. So in my case, id need twice as much (30lbs ) for my 20g.

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Old 05-18-2010, 05:02 PM   #4
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IMO you need 1 lb to 1.5 lbs per gal.
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Old 05-18-2010, 05:35 PM   #5
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A general guide line is 1-2 lbs per gallon. It really depends on the rock. If you get some lightweight rock then you can keep it close to the 1 lb while if you get heavy rock then closer to the 2 lbs weight. A good middle of the road type is the fiji LR. It is very pourus and has lots of surface area.
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Old 05-18-2010, 11:16 PM   #6
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Quote:
Originally Posted by redneckgearhead View Post
IMO 1-1 1/2 lbs per gallon
+1 for 1 - 1 1/2 lbs of LR per gallon.
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Old 05-19-2010, 01:17 PM   #7
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other than astetics, it depends only on your stocking level
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Old 05-19-2010, 01:37 PM   #8
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There are several factors which we cannot determine for you: Type of rock, density of rock, and your end stocking level. But the rough guideline as everyone else said is 1 1/2 lbs - 2 lbs per gallon.
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Old 05-19-2010, 01:52 PM   #9
Thanx but no.....


 
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Sooo... how much rock do I need?

90 gallon tank, 30 gallon sump, skimmer,
70% figi, 30% tonga rock

Humu Trigger
Yellow Tang
Black/Tan Angel
2 clowns
2 yellow tail damsels
lawnmower blenny
Yellow Watchman goby and his p-buddy
2 cardinals
2 serpant stars
crabs, hermies, snails, minimal corals
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Old 05-21-2010, 06:47 AM   #10
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Well the answer is no more than 70 lbs. 50 figi, 20 tonga. If I move to a 300 gallon tank, I need no more than I have today, if I move to a smaller tank I need no more than I have today.

I guess it must have been the density
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