I started using Rhowaphos about 2 months ago. My results have been excellent so far. It keeps my Phosphates at zero and I'm a heavy feeder. I've heard Phosban gives better bang for the buck, but I can't say as I've only used Rhowaphos. There are some reports of SPS losing colour after implementing, but this has not been the case with mine. When you first put it in the reactor make sure to run water outside your system through it to rid it of the brownish powdery sludge otherwise you will get that in your tank.
Mark, are you back in town? 
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135G Mixed Reef. Bullet 2, 25 gal refugium, 2 X250W MH + 4X 96W PC\'s, DIY Calcium Reactor, Coralife 1/6 HP Chiller, Phosban, Tunze, 2 closed loops & SQWD\'s, Seios, Coralife 4 stage RO/DI & a bunch of other expensive gadgets... I may never retire, but I'm gonnahavahelluvanaquarium!
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