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#51
12/14/2007, 01:42 PM
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The optimal calcium level is largely unrelated to the alkalinity. I'd target 2.5-4 meq/L (7-11 dKH), almost regardless of what calcium level is targeted.
The only time they are related is if you are trying to raise or lower them together, such as by adding equal parts of a two part, or allowing corals to drop both by using them up.
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Randy Holmes-Farley |
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#52
12/15/2007, 11:48 AM
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Just checked mine
SG 1.0255 (under shot it a bit) IO swing arm PH 7.9 (only mixed for 10hrs) API Alk 12.5 API Ca 360 API Seems like a good thread to make sure your numbers are ON...If you use RC. I have no complaints....at least it is consistent. |
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#54
12/15/2007, 12:42 PM
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Like jdieck said....it smells different. It has something different in it and it mixes up less clean.
It has a rich smell like minerals or something. But yes it seems to have the same parameters. |
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#55
12/15/2007, 12:56 PM
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Quote:
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[This space for rent] |
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#56
12/15/2007, 02:17 PM
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i just got a new bucket of rc to try in addition to io. i'll test the rc at some point in the next few days. i'll mix up ~40 gallons, so a larger sample to draw from
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Anthony red house, up there^ = my tank pics "Use filters" |
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#57
12/15/2007, 02:34 PM
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Quote:
I tested a new batch of RC just the other day and at 1.0264 (35 ppt) it registered 420ppm calcium. As it always does. Those of you seeing other readings are either mixing wrong or have faulty test kits IMO. |
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#58
12/15/2007, 03:30 PM
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Billy, I think I can speak for all of us when I say that either your calcium kit is bad or you're refractometer is off by about 25 %.
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#59
12/15/2007, 04:55 PM
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Quote:
__________________
[This space for rent] |
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#60
12/15/2007, 04:57 PM
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Is anybody else starting to think that Michael Del Prete is right now ?
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#61
12/15/2007, 05:43 PM
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Quote:
 I checked it with gram scales and table salt not long ago and it was dead accurate. Three level cups of RC in a 5 gallon bucket mixes to about 1.028 |
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#62
12/16/2007, 01:34 AM
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Quote:
acrylic, Tell you what I'll do. I have 16 gallons of ro/di ready. I have a bucket measured precisely at 5 gallons. I will fill the bucket, heat to 79 deg, and add exactly 3 cups of RC. I will aerate overnight and take a reading in the morning and post my results. I will take the reading with my refract and my lab grade floating hydrometer. Mike, the answer to your last question is NO.
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#63
12/16/2007, 11:20 AM
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My previous bucket of RC and the one Im on now mix to 1..026 with calcium around 420. Try pouring half in another empty bucket, shaking it, then mixing back together and shaking. I've been told by people in real life as well as on here that since it's dry, stuff is going to settle and will cause you to have different reading on different mixes from the same bucket.
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#64
12/16/2007, 02:44 PM
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The results are in.
According to my testing, 3 cups of RC in 5 gallons of water sat overnight and aerated. S.G refract 1.026 S.G. lab grade floating hydo 1.026 Calcium Saifert 425ppm Calcium API 420ppm Calcium LaMotte 430ppm Hope this helps all.
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#65
12/16/2007, 04:16 PM
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Is anybody else starting to think that Michael Del Prete is right now ?
About what?
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Randy Holmes-Farley |
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#66
12/16/2007, 04:25 PM
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The overall decline in salts. How prices stay the same or less in the face of inflation across the board.
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#67
12/16/2007, 04:32 PM
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Will a SG difference of .002 throw calcium off 60 ppm?
It still seems odd that some people are getting right around 360 and others right around 420. If my swing arm is a little off and API measures a little low then I suppose it could be 420. |
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#69
12/16/2007, 08:17 PM
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Quote:
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#70
12/16/2007, 09:11 PM
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Quote:
Drop the 1. 026 divided by 420 is 16.15. So .002 of will make a difference of about 32 ppm or so. 60 is a bit of a stretch but there is a little test noise in all hobby grade test kits. |
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#71
12/16/2007, 09:26 PM
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I just tested, all Salifert tests
420 ca, 11.4 alk Salinity 1.026 checked w/freshly calibrated pinpoint salinity meter.
__________________
Some drink at the fountain of knowledge, some just gargle, but most are rabid. |
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#72
12/16/2007, 09:34 PM
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Looks about right Doc.
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#73
12/16/2007, 09:37 PM
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my RC also tests quite low and I'm very dissapointed. I usually use TM Pro but I got RC in a pinch about a week ago and tested it.
SG- 1.026 CA- 360 ALK- 13 DKH Mag- 1150 all tests were done with Salifert and I always heard that this was pretty good salt but now I'm not sure. |
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#74
12/16/2007, 11:26 PM
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Quote:
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Did I write what I wrote? What the heck am I talking about! Well..... Nevermind. |
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