Feeding the tank during the day with the photoplankton and reef snow? If you are I would do that at night with some moonlights on as that seems to get better feeding responses from polyps. The hair algae is consuming all the phosphates/nutrients so that when you test you are getting false readings of 0 when you do have some. Also I would bump the water change up to 20% and would recommend if you can to do more water changes like bi-weekly as that will help you a lot with nutrients and keeping levels perfect. Also you running RODI water at 0 tds?
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75G Reef Ready Tank Setup 2/28/10 connected to basement 75G tank & 50G Sump
1 mated Pair of clowns one female true perc and a male misbar perc,1 Bangaii Cardinal, 1 Blue Spotted Goby, 1 Kole Tang, 1 Pacific Blue Tang, 1 Melanarus Wrasse, 18" Purple S. Gigantea Nem(Oct. 2010)
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