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Old 09-20-2009, 01:28 AM   #1
williams.luca
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how much live rock???


I am goin to be starting a 75 gallon fowlr how much do i need of live rock??? I want to to have some but want room for fish to swim around. It is goin to be stocked fairly well.
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Old 09-20-2009, 02:45 AM   #2
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You generally want 1 to 1.5 lbs of live rock per gallon of water you have. More rock means more space for beneficial bacteria. Having more bacteria is what you want, expecially if you plan on having the tank fairly well stocked. I would go with at least 75 lbs if it were me starting the tank. You can probably go with a little less and be just fine though, as long as you stock slowly. Another option that would be more affordable would be to buy about 15 or 20 lbs of live rock and buy the rest in dry, aragonite base rock. Aquascape your tank how you like with the base rock on bottom and live rock on top. Within a few weeks your live rock will begin to seed your base rock with bacteria and soon you'll have a tank full of live rock. That's my advice. Good luck with the tank! Be sure to share with us some pics.
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Old 09-20-2009, 05:49 AM   #3
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I agree with ibanez2k but I'd start with 100 lbs.That way if you add some more,it won't be much and shouldn't cause enougher cycle.
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Old 09-20-2009, 07:47 AM   #4
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100lbs is a good round number.
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Old 09-20-2009, 07:58 AM   #5
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I agree. Anywhere from 75lbs to 100lbs would be ideal. I would start with 75lbs, then create your desired aquascaping and add from there.
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Old 09-20-2009, 08:55 PM   #6
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I started my 55 with 55 lbs when i was done there was about 75 - 80 lbs there as plenty of room for the fish to swim and there as no chemical problems with the tank it was very stable.
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Old 09-20-2009, 09:02 PM   #7
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I really can't say a specific #/gallon rule that is worthwile. 1 pound per gallon is a rough estimate bit I have seen tanks everywhere between .5-2#/gallon in successful tanks. There is a point of diminishing marginal return, where adding more rock is only decreasing the amount of water in the tank. For a tank with only fish and no corals, I think around 1/gallon will likely be plenty, as if you have problems with ammonia you can add HOB filters like biowheels that can process a lot of ammonia to nitrate in a very small package.
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Old 09-20-2009, 10:03 PM   #8
williams.luca
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thts what i was kinda thinking.... i want room for the fish to swim so i can put some in a sump i guess too
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Old 09-20-2009, 10:07 PM   #9
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I would say just enough to achieve the scape you want

You can always add more to the sump or fuge (if you have one) to add room for bacterial colonization, but over the years I've seen some pretty stocked tanks with minimal rock.
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Old 09-20-2009, 10:10 PM   #10
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personally I say only as much as you need to het the desired look and feel that your looking for... i work for a LFS and this is the advice that I give all,cause in my opinion an LFS will tell you the pound per gallon rule...
ok yes its a good rule of thumb but not nec. i believe, have seen way too many ppl spend more cash then needed, esp when you can apply some of that money towards something else you want or need for your system
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Old 09-21-2009, 11:50 AM   #11
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How long would you estimate it would take for base rock to be seeded by live rock? I've got a 55 gallon that I'm looking to start as a FOWLR and I was planning on going 60/40 or so base to live rock. Stocking would be slow so I was hoping that the base rock would be seeded by the time the bioload started to pick up.
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Old 09-21-2009, 05:01 PM   #12
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Quote:
Originally Posted by Tyyrlym View Post
How long would you estimate it would take for base rock to be seeded by live rock? I've got a 55 gallon that I'm looking to start as a FOWLR and I was planning on going 60/40 or so base to live rock. Stocking would be slow so I was hoping that the base rock would be seeded by the time the bioload started to pick up.

I used 2.5 pounds of live rock to seed 40 pounds of base rock. It took about 3 weeks for the tank to stabilize. At that point I am assuming was when my rock went from dead to live since all my parameters are perfect and the rock is filtering the water nicely!

I'm two months in on the rock and it is now just starting to show coarline algae and a few feather dusters.
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Old 09-22-2009, 06:48 AM   #13
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That's a heck of a lot faster than I'd have imagined. That's about how quickly you could seed a new filter in a freshwater tank.
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