acrylic_300
New member
How much are we betting?
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
Why does reef crystals only have 320 Ca?
- Thread starter StrategicReef
- Start date
How much are we betting?
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
Billybeau1
Premium Member
<a href=showthread.php?s=&postid=11390913#post11390913 target=_blank>Originally posted</a> by Mike O'Brien
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 %.
Nope. Calcium checked with two different brand kits both matched. And refract is calibrated with 53 mS pinpoint solution verified by my lab grade floating hydrometer. They are both dead on.
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.
Runfrumu
Hi
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.
Billybeau1
Premium Member
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.
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.
Is anybody else starting to think that Michael Del Prete is right now ?
About what?
About what?
Mike O'Brien
New member
The overall decline in salts. How prices stay the same or less in the face of inflation across the board.
acrylic_300
New member
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.
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.
Billybeau1
Premium Member
It's a simple equation.
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.
Billybeau1
Premium Member
Looks about right Doc. :wavehand:
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.
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.
jdieck
New member
<a href=showthread.php?s=&postid=11396767#post11396767 target=_blank>Originally posted</a> by Billybeau1
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.
Yes! it really helps a lot to know that your bucket is OK
aastretch64
New member
Dr. Foster and Smith RC's aeirated at least 24 hours tested with sailfert.
SG 1.026
Mag 1220
Alk 12.8
Cal 360
SG 1.026
Mag 1220
Alk 12.8
Cal 360
Bear in mind that if all of the alkalinity in a salt mix (4 meq/L or 10 dKH) precipitated as calcium carbonate, the calcium would only drop by 80 ppm. Of course, that would leave no alkalinity, which was not observed. A drop of 1 meq/L (2.8 dKH) from normal is only a 20 ppm drop in calcium.
The caveat is that if you have not allowed the salt solution to totally settle, precipitated calcium carbonate could show up as alkalinity still, if the solids get into the alk test solution.
The caveat is that if you have not allowed the salt solution to totally settle, precipitated calcium carbonate could show up as alkalinity still, if the solids get into the alk test solution.
