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Old 01-02-2006, 01:18 PM   #1
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is it ok to start my cycle?

90 gal tank with 100lbs of reef sand and filled with di/ro water leaving about 6 inches from the top for the displacement of the water when i add my base rock and live rock. just waiting for the base rock to be delivered then i will go to the lfs to get the lr. just wondering if i could throw in a couple of shrimp to start my cycle before adding the rock. the sg is at 1.024. Thanks in advance.
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Old 01-02-2006, 02:04 PM   #2
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NO, Just make sure that the rock is uncured its better.. precured you will have alot of die off and with a sand bed it can cause problems. Shrimp can be added when you get the live rock.
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Old 01-02-2006, 02:06 PM   #3
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first ? is this going to be a reef tank? If so SG is low bring it up to 1.026 and are you using a hydrometer or refractometer?
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Old 01-02-2006, 02:24 PM   #4
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I would put the rock in, then add the shrimp. You want the bacteria to grow on the rock and even if it is cured liverock, this will boost the bacteria count. I feel that the salinity is just fine.
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Old 01-02-2006, 02:27 PM   #5
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according to all experts the SG for a reef tank should be at 1.026, low end 1.025 reason is parasites dont like high SG, lower the SG more problems. But first it really depends on how you are checking SG if a hydrometer i would go 1.024, a refractometer 1.026.
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Old 01-02-2006, 04:17 PM   #6
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according to all I have read, 1.023 to 1.025 are proper levels for a reeftank. Mine is kept around 1.024-1.025 and my corals, fish and inverts do remarkably well. This is for all of my tanks, not just the tanks with corals in them.
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Old 01-02-2006, 05:06 PM   #7
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I agree with Hara...although I am fairly new to the saltwater hobby, I have had read plenty over the years, and even worked at a pet store that dealt only in fish. IMO, 1.023-1.025 is good. I read somewhere that "real" saltwater is 1.022 or 1.021, depending on the location of course, but this number was an average.
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Old 01-02-2006, 08:17 PM   #8
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DID you ever read the reefkeepers MAG? DR RON suggests 1.026.

Normal Seawater is 1.027 this was updated this year.
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Old 01-02-2006, 08:29 PM   #9
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thanks for all the input. this is going to be a FOWLR tank, and i am checking the SG with a floating hydrometer. like i said, i have left about 6 inches to the top of the tank, so i am assuming that once i add 140 lbs of rock, i will either have to take some water out before it overflows, or add more salt water because i am too low. so either way i know that i will have to adjust my sg, but i too thought that 1.023 - 1.025 is ok. please advise. also, how accurate are the floating glass hydrometers? i thought since it was more expensive than the ones with the floating needle, that it would be more accurate.
thanks again.
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Old 01-02-2006, 08:29 PM   #10
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Well someone better send the memo to my corals, they do just fine. Luckily they can't read Reefkeepers magazine or I would be in trouble.
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