DesertReefT4R think you are getting your messages crossed my N03 is 2ppm not 160 that's JustAClownFish's comments. I find no water changes has little effect on my coral growth, there may be some trace elements not being replenished. The 2 x 40 LED Dsuny lights I have are from Ebay Chineses made 4 channel WiFi I find they give excellent light over my 44 inch for £200
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Dave 3 years still lots to learn about reefing
Mag Curve 5 Skimmer, Jebao 4 way dosing pump,4 way slave, Maxspect Gyre 2 x XF230
T5 4x39w 2xBlue 1xBlue Plus 1xPurple
Mixed SPS & LPS
Current Tank Info: Red Sea Max C130. Self built 44x19x19 tank and stand June 2016 Maroon Clowns , 2 Pajamas, Sand sifting Goby, mixture of SPS and LPS
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