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Old 12-19-2007, 08:13 PM   #1
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How can you tell if a clam is getting enough light?

How can you tell if a clam is getting enough lighting? My LFS said if they are not getting enough lighting then they will NOT open all the way up. Is this true? My clam is about 17" down from the surface and it is looking good but it has only been about 4-days. My plan is to move it up once it attaches itself to the small flat rock I put it on. I haven't checked to see if it has attached yet or not. It is a crocea under 440watts of VHO in a 75gallon. Thank you.
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Old 12-19-2007, 10:39 PM   #2
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Boy that`s a tough one. I would say that it might not be enough for that type clam. I have the same set up as you except I have 6 ft bulbs. I have a squamosa clam as they take less light then the type you have. One thing I do is use URI VHO bulbs as they have internal reflectors and a reflector dome over those to utilize all the light. I`m thinking I heard others say you really need the intensity that MH`s give for Crocea`s. JMO
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Old 12-19-2007, 10:41 PM   #3
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Im not sure but #1. I do not think that is enough light either and #2. I have never put a clam higher in the tank as they like to burrow in the sand in my tank. HTH
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Old 12-19-2007, 11:48 PM   #4
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A crocea is a high light demanding clam. I don't think you have enuff light either.
Quote:
I have never put a clam higher in the tank as they like to burrow in the sand in my tank.
Actually, croceas are rock boring clams. In the wild they are found buried in rock with only the mantle exposed. Some good clam info here
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Old 12-20-2007, 12:51 AM   #5
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Thanks for the information. I read a thread from a google search about how they prefer rock placement, I also found threads from people who had success keeping with VHO and high placement. Then again I also read thread about people who have mandarins doing fine after putting in a tank after 6months with plenty of LR. Needless to say, I returned my mandarin to the LFS after a couple months when the stomach first started to cave in. Hopefully the crocea will be fine with the 6-watts per gallon of VHO otherwise I will return it too. I just wish there was a way I could tell. What the LFS store said about it being open all the way if it is happy may have just been a pitch to sell it.
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Old 12-20-2007, 12:21 PM   #6
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lol I stand corrected! now I need to look into getting a little one for the roof of my tank!
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Old 12-20-2007, 02:59 PM   #7
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How big is your clam?
Below about 3" they require supplemental feedings of phytoplankton (e.g. DT's Live Marine Phytoplankton). Larger clams should also get occasional supplemental feedings.
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Old 12-20-2007, 05:48 PM   #8
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Great article CCCAPT. Thanks.
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Old 12-21-2007, 05:35 AM   #9
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Mine is less than 3", probably around 2-2.5" I have been putting cylcopes into my aquarium as a source of phytoplankton. If there is something else I should be using instead, please let me know the brand name so I can go out and get it. Thanks.
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Old 12-21-2007, 12:53 PM   #10
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DT's Pytoplankton is what I use...It's good stuff, my T.Crocea has been doing great with it. Of coarse he's also 9 inches from a 150W MH bulb as well.

That was a great article...Great Info.
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