chimera Posted October 7, 2006 Report Share Posted October 7, 2006 Just did a 20% water change using NSW - thought I'd test the water before I added it. I got the water from Arkles bay on the Whangaparoa - this is in the same "region" as Takapuna which is where a good portion of reefers in Akl get their water from. Results are: Salinity = 1.029 (refractometer with ATC) pH = 8.24 (Pinpoint pH meter) Ca = 380 (Salifert) Mg = 1170 (Salifert) kH = 7.0 (Salifert) NO3 = undetectable (Salifert) PO4 = undetectable (Salifert) I think most of us know that NSW is under the range that most of us keep our parameters at - for those that don't you've just learnt something Point to make is water changes will obviously pull these figures down so best to top up, not just freshwater, but Ca / Mg Chloride and any other additives you use after each change. Quote Link to comment Share on other sites More sharing options...
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