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Old 09-27-2005, 04:29 PM   #11
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Have you tried running a phosban reactor in your system? Maybe you've changed food that you're feeding or amount? Your nitrates test at or near 0? What about PO4?

If the tank has been running for 4 years with no problems it must be very strange and aggravating to suddenly have a massive outbreak of hair algae. Wonder if something is going weird in your sand bed?
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Old 09-27-2005, 04:33 PM   #12
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Won't turning the lights off for a couple of days affect your corals that are in your tank?
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Old 09-27-2005, 05:09 PM   #13
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Old 09-27-2005, 05:24 PM   #14
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Ok let me see if i can catch up. My bulbs are only about 6 months old. I can not turn off my halides for a long period of time. To many corals. That is totally not an option. I have been removing it manually. Nitrates and Nitrites are at 0. Have not tested po4. I have a deep sand bed. I just don't know what to do. I mean is it normal for a tank that has been set up this long to suddenly have an outbreak of hairalgea?
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Old 09-27-2005, 08:30 PM   #15
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One way I have gotten the phosphates down on several instances was to get 1 or 2 oz of Phosban in the tank changing it weekly with 15% water changes using RO/DI (the deionization part is important for this) water with a new membrane and in 3 or 4 weeks it should be down to zero. If not, then your problem should definitely be on the feeding side. All this, while pruning all the hairy stuff you can.
I don't think LR will leach PO4s...
I once heard a guy who had a problem with its aragonite sand he used. He got it from some pet place and did not rinse the sand well and he had the problem for over a year and after hundreds of dollars spent in Phosban... He said there was always a milky silt in the sand when he vacumed it. He supposed that might've been the problem.
Well HTH.
Good luck
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Old 09-27-2005, 08:33 PM   #16
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Ah, I realized too late your tank does not have new substrate. Disregard my last paragraph...
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Old 09-27-2005, 08:41 PM   #17
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I would still have your source water tested for nitrates and phosphates...I hate to be redundant but in catching up I don't think you mentioned if you did. Old tank syndrome with DSB usually appear as both hair algae and cyano...any cyano on the sand anywhere?
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Old 09-28-2005, 12:19 AM   #18
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RO water can have PO4. You need RO/DI water. If you are getting your water from a store they might have old filters in it.

As for your lights, Hara was suggesting a few days off. This will not hurt your corals. Even acros will be fine for a short period.
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Old 09-28-2005, 01:06 AM   #19
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If you don't eliminate the source of the problem though, leaving the lights off will do nothing. It will hurt the photosynthetic organisms that are more desirable (coralline, macro, corals, etc.) and can outcompete the hair algae as much as it will effect the hair algae. It may work if you eliminate the source to hasten the wasting away/elimination of the hair algae.
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Old 09-28-2005, 09:53 AM   #20
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What filtration do you use. Instead of going with a Phosban system you can just add some decent phosphate remover to your filter. I used Phosguard I think in my Emp 400. It worked, then I had a bacterial problem and the bloom returned later. 8O It is going away now.
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