andy Posted February 11, 2008 Share Posted February 11, 2008 http://www.reefcentral.com/forums/showthread.php?threadid=1317416 Quote Link to comment Share on other sites More sharing options...
Michael7979 Posted February 11, 2008 Share Posted February 11, 2008 Corallife seemed to have pretty good numbers. Was shocked at some of the findings. Might think about trying a new salt on next purchase. Quote Link to comment Share on other sites More sharing options...
Chief Posted February 12, 2008 Share Posted February 12, 2008 I guess I do not understand why they did not mix each batch to 35ppt. It does not seem like an even playing field. Jay Quote Link to comment Share on other sites More sharing options...
Michael7979 Posted February 12, 2008 Share Posted February 12, 2008 All I can think of is........ this way everything was the same. Yeah I know that maybe the water should be at 35ppt for the 'best' test, but......... instaed of using 8 grams of this salt, and 11 grams of this one, and 15 grams of this one. Maybe they thought that would raise even more questions about the comparisions. Who knows just typing outloud! lol Quote Link to comment Share on other sites More sharing options...
andy Posted February 12, 2008 Author Share Posted February 12, 2008 Yeah, I think it was a "damned if you do, damned if you don't" situation -- fortunately, the math to normalize the results is easy enough. Quote Link to comment Share on other sites More sharing options...
Michael7979 Posted February 12, 2008 Share Posted February 12, 2008 Yeah' date=' I think it was a "damned if you do, damned if you don't" situation -- fortunately, the math to normalize the results is easy enough.[/quote'] OK Mr. Wizard!! (laugh):p(laugh):p(laugh):p(laugh) Help some of us out post the formula or some of the 'fixed' #'s would ya. (scratch)(whistle)(plotting) Quote Link to comment Share on other sites More sharing options...
andy Posted February 12, 2008 Author Share Posted February 12, 2008 Sure, you figure how far off the actual SG was from the ideal (35ppt) as a percentage, then increase the other parameters by the percentage difference. So lets say one of the salts measured out to 30ppt. 30/35 = 0.86, or a 14% difference. If the measured Ca was 400ppm at 30ppt, it'd be 456 adjusted to 35ppt (400 + 14% = 456) I think somebody did the math for the posted stuff on the RC thread. Quote Link to comment Share on other sites More sharing options...
andy Posted February 13, 2008 Author Share Posted February 13, 2008 UPDATE: FYI, from AWT: We watched the Reef Central posts this morning to gauge the responses to the salt assay. We believe there is some misunderstanding pertaining to the actual salts that were tested. The salt that we mixed up for the "yield" test was discarded after the data was collected. The salts that were tested by parameter were all mixed up to 53mS, and double checked with a temp-compensated refractometer. Quote Link to comment Share on other sites More sharing options...
Chief Posted February 13, 2008 Share Posted February 13, 2008 UPDATE: FYI, from AWT: We watched the Reef Central posts this morning to gauge the responses to the salt assay. We believe there is some misunderstanding pertaining to the actual salts that were tested. The salt that we mixed up for the "yield" test was discarded after the data was collected. The salts that were tested by parameter were all mixed up to 53mS, and double checked with a temp-compensated refractometer. Now that makes more sense to me. But also raises more questions. Still looking for that amazing "perfect out of the bucket" salt. Jay Quote Link to comment Share on other sites More sharing options...
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