rainbowreef Posted May 31, 2018 Share Posted May 31, 2018 Hi all, it has been over 6 months since I added revoreef 3DM reef sand to my nano tank. I have been able to establish the consumption rate of Alk by my corals and have started to dose alk supplement. However, I have measured fluctuation in Cal between 420ppm - 500ppm without dosing any Ca supplement. According to Qi Hu's website about the revoreef sand, the artificially manufactured sand contains minerals and trace elements, specifically mentioned CaCO3, MgCO3, and Mn. I wonder if it's the sand that has been causing the fluctuation, and if so, is there anything I can do to combat the issue? Thanks in advance for all advice. Quote Link to comment Share on other sites More sharing options...
rainbowreef Posted September 1, 2018 Author Share Posted September 1, 2018 Just a quick update. I'm still having problems with Ca fluctuation and I'm contemplating to remove the 3DM reef sand. I have measured my Ca for the past few days with Salifert Calcium test and have got 370ppm on Thursday, 350ppm yesterday, and 400ppm today. I have not added any Ca supplement as I'm unsure about how I can dose with this Ca fluctuation. Would be great if anyone who had or is still using this substrate to share your experience. As of now, I will be cautious in using this sand again in any reef tank, but don't see any issue using this in FOWLR system. Quote Link to comment Share on other sites More sharing options...
Asteld Posted September 19, 2018 Share Posted September 19, 2018 Just give it some time , my ca was at 680ppm 2 weeks ago and i tested yesterday it was down to 500 already, probably cause of my clam. Sent from Singapore Reef Club mobile app Quote Link to comment Share on other sites More sharing options...
SRC Supporter Harlequinmania Posted September 19, 2018 SRC Supporter Share Posted September 19, 2018 Maybe u would also want to check if the issue was due to your test kit as well ? Try get another test kit brand or do two same water test on the same day to see if it tally. Sent from Singapore Reef Club mobile app Quote 1000 Gallon Tank in the Hole http://www.sgreefclub.com/forum/topic/120957-1000-gallon-3d-hole-in-the-wall/ Link to comment Share on other sites More sharing options...
sherman Posted September 20, 2018 Share Posted September 20, 2018 Or get a reference fluid to check if your test kit is reading right Quote 6.5 * 2 * 2 + 3.75 * 1.5 *1.5,(Decomn on 14/9/08) 4*2*2 + 2.5*1.25*1.25 (Decomn on 1/8/09) 5*2*2 (Fully LED light system, 140 3 watt SSC leds with 60 degree lens)(Decomm) 2.5*2*2(Fully LED Light System,96 3 watt SSC leds with 60 degree lens)(Decomm) 5*2.5*2(LED only) Eheim return 1 * pump 1 HP Daikin compressor with cooling coil 2 Jebao OW40, 1 ecotech MP40, 1X6085 Tunze wm, 1 CURVE 7 Skimmer 1 DIY 80 led control by Bluefish mini 1 radion XR30W G2, 2 Radion XR15G3 Sump area lite by 5 ft T5 , 6 * SSC 3 watt red LED for refugium 1 Full spectrum E27 led light 1 CR control by bubble count Start No Water Change since 1st Dec 2016 Add new 2.5x2x 1.5 ft [/quote] Link to comment Share on other sites More sharing options...
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