TURSTY Posted April 21, 2013 Report Share Posted April 21, 2013 Hey all, Sorry if this has been answered elsewhere (I did a search and couldn't find anything), but I was wondering if anyone has tested their collected NSW for the above 3 elements? Are they usually higher then what you would find in the tap? Sam Quote Link to comment Share on other sites More sharing options...
livingart Posted April 21, 2013 Report Share Posted April 21, 2013 it will vary slightly from north to south try this link http://www.reefkeepers.co.nz/forum/foru ... =11&t=1276 NSW readings are: kH: 7.0 Mg: 1200 Ca: 370 Salinity: 1.027 When you collect your NSW, add the following for every 100 litres of NSW makeup water to bring levels up to required ranges for a reef tank. kH: Add 6 grams (1.2 teaspoons) of Baking Soda (to bring alkalinity to 9.0kH) Mg: Add 125 grams of magnesium Chloride Hexahydrate (to bring Mg to 1350ppm) Ca: Add 18 grams of Calcium Chloride Dihydrate (to bring Ca to 420ppm) Salinity: Add 7.5 litres of freshwater, preferably RO/DI (to bring salinity down to 1.025 assuming its initially 1.027) It is of course recommend you test your own NSW first to double check the readings above are inline with what I've found, however this should give you a rough idea of what to add. Quote Link to comment Share on other sites More sharing options...
Coketech Posted June 25, 2013 Report Share Posted June 25, 2013 Not much help as I cant remember the readings, but I collected NSW from Taylors Mistake on a nice incoming tide. Standard rules apply, make sure it hasn't been properly raining for 3 days prior, check ECAN's water quality website for whats gross at the moment. I had to boost Ca Alk and Mg by a small quantity but just roughly the same recipe listed in this thread. In two weeks (after exams are over) I'll be collecting NSW again and I'll post my readings here. Im thinking I might collect from Te Oka Bay on the South side of Banks Peninsula this time, there are interesting rock pools there and its a nice excuse for a family picnic! Quote Link to comment Share on other sites More sharing options...
si_sphinx Posted June 26, 2013 Report Share Posted June 26, 2013 Last time I collected NSW down here (Invercargill): Ca - 420ppm Mg - 1170ppm kH - 143ppm / 8dkH Salanity - 1.025 to 1.028 (sometimes I don't even have to add RODI water). All at good levels except for the Magnesium which doesn't take much to bring it a little higher. Quote Link to comment Share on other sites More sharing options...
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