Here We Go Again! - Page 38

sasquatch · 09-15-2007, 10:25 PM

Refractometers and Salinity Measurement

Some late night reading for you Steve

Melanie · 09-15-2007, 10:42 PM

What a great idea Christopher! I did compare and I nearly fell over.

Freshly Mixed Salt Water:
Refractomer - 1.025
Hydrometer - right between 1.022 and 1.023

My Hydrometer is very old. Maybe 5 years old? And it is one of the cheap, swing arm models. I would have never imagined it would be so far off.

hma · 09-15-2007, 10:47 PM

A question Melanie. Do you have also two scales in your refractometer like I? On the right side the scale for PSU, on the left side for density?

GeeWizzItsMe · 09-15-2007, 10:53 PM

Well, looks like the accurate reading was much better! Yay! Maybe this means mine could be 1.027 when I think it is 1.025!!

Melanie · 09-15-2007, 10:56 PM

Thanks to Sasquatch, I have found some calibration solution for refactometers. Very interesting reading that I skimmed and will read more thoroughly.

Melanie · 09-15-2007, 10:59 PM

Heinz, the left is measurements like 1.025 and the right is percent measurements like 35%.

hma · 09-15-2007, 11:13 PM

Quote:

Originally Posted by Melanie

Heinz, the left is measurements like 1.025 and the right is percent measurements like 35%.

OK, it is exactly as with my refractometer. You should never believe the data of the left Scala. As I already wrote. A refractometer can measure only PSU. Density depends always on the temperature, salinity not. Therefore values are by a refractometer were measured not comparably with the measured values aerometers.

35% PSU = 1023.34 Density and not 1.025 as you read from the left scala

Craig Manoukian · 09-16-2007, 12:41 AM

Steve,

Made the article a favorite! Karma to you!

sasquatch · 09-16-2007, 12:47 AM

LOL thanks! I only needed 1 advil for that session

GeeWizzItsMe · 09-16-2007, 11:06 AM

7-23-07

9-07

You win!

Craig Manoukian · 09-16-2007, 12:28 PM

Way cool progress!

Melanie · 09-16-2007, 01:20 PM

Did my tank maintenance today. Thought I'd share some photos and test results.

Test Results Today @ Noon
Temp 78
SG 1.027 (little too high. will slowly lower with water changes)
Mg 200 (way too low. need to supplement)
Ph 8.3
Nitrite 0
Ammon. 0
dKH 11
Ca 520 (too high but adjusting with water changes and hopefully Mg suppl.)
Nitrate 0
Phos 0

The view under my tank.

New ATO

Phosban Reactor with carbon

New Hydor Koralia PH. I LOVE it! Going to replace my sweeping PH with these.

New refactometer.

Craig Manoukian · 09-16-2007, 01:47 PM

Woohoo Mel, great stuff, and nice work! My refractometer is just like yours!

bluespotjawfish · 09-16-2007, 06:58 PM

Quote:

Mg 200 (way too low. need to supplement)

Melanie, did you mean 1200? If not, I would guess that this is a result of an incorrect test kit (or one that was not done properly) and I would recommend that you retest this before you modify anything.

DrHank · 09-16-2007, 07:45 PM

I agree with Lorraine. I never trust a reading that is way off. The first thing I do is clean up the test vial with DI water and then carefully redo the test. If it's still not right I get a hold of someone in my reef club and take a water sample.

If your retest comes up like the first. your test reagents are probably bad.

09-15-2007, 10:25 PM	#556 (permalink)
sasquatch Brunt of all Jokes~ Join Date: Aug 2006 Location: the very farthest west coast of canada Posts: 8,917 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Refractometers and Salinity Measurement Some late night reading for you Steve __________________ castawayreefers.com

09-15-2007, 10:42 PM	#557 (permalink)
Melanie Golden Moray Join Date: Jun 2007 Location: Naples, Florida Posts: 2,120 View Gallery Karma Komment Add yours!	Re: Here We Go Again! What a great idea Christopher! I did compare and I nearly fell over. Freshly Mixed Salt Water: Refractomer - 1.025 Hydrometer - right between 1.022 and 1.023 My Hydrometer is very old. Maybe 5 years old? And it is one of the cheap, swing arm models. I would have never imagined it would be so far off. __________________ My Reef Journey Latest Recap My Videos My Flickr Photos Pres. of Dork Club I love ScubaDrew and North East Coral! Read why HERE...

09-15-2007, 10:47 PM	#558 (permalink)
hma Golden Moray Join Date: Aug 2007 Location: Frankfurt, Germany Posts: 2,208 View Gallery Karma Komment Add yours!	Re: Here We Go Again! A question Melanie. Do you have also two scales in your refractometer like I? On the right side the scale for PSU, on the left side for density? __________________ Heinz Luck is a good health and a bad memory (Albert Schweitzer) Balling Method : Balling +Plus Video : Centropyge potteri Tools : Balling Calculator My Chronicle and ReefDreams HM-Aquarium Photo Calendar 2008 "IF SHARKS DIE, THE SEA DIES"

09-15-2007, 10:53 PM	#559 (permalink)
GeeWizzItsMe See Golden Compass Join Date: Jul 2007 Location: Nashville Posts: 1,857 View Gallery Karma Komment	Re: Here We Go Again! Well, looks like the accurate reading was much better! Yay! Maybe this means mine could be 1.027 when I think it is 1.025!! __________________ VP of Dork Club http://www.reefsanctuary.com/forums/...-new-tank.html

09-15-2007, 10:56 PM	#560 (permalink)
Melanie Golden Moray Join Date: Jun 2007 Location: Naples, Florida Posts: 2,120 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Thanks to Sasquatch, I have found some calibration solution for refactometers. Very interesting reading that I skimmed and will read more thoroughly. __________________ My Reef Journey Latest Recap My Videos My Flickr Photos Pres. of Dork Club I love ScubaDrew and North East Coral! Read why HERE...

09-15-2007, 10:59 PM	#561 (permalink)
Melanie Golden Moray Join Date: Jun 2007 Location: Naples, Florida Posts: 2,120 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Heinz, the left is measurements like 1.025 and the right is percent measurements like 35%. __________________ My Reef Journey Latest Recap My Videos My Flickr Photos Pres. of Dork Club I love ScubaDrew and North East Coral! Read why HERE...

09-16-2007, 12:41 AM	#563 (permalink)
Craig Manoukian Regular Guy Moderator Join Date: Nov 2003 Location: Marina Del Ray, CA Posts: 18,352 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Steve, Made the article a favorite! Karma to you! __________________ Currently tankless. 20 Gallon mini reef with mated pair of Maroon Clowns given to Rougiem! 80 gallon reef given to Rougiem/Wooster HS.

09-16-2007, 12:47 AM	#564 (permalink)
sasquatch Brunt of all Jokes~ Join Date: Aug 2006 Location: the very farthest west coast of canada Posts: 8,917 View Gallery Karma Komment Add yours!	Re: Here We Go Again! LOL thanks! I only needed 1 advil for that session __________________ castawayreefers.com

09-16-2007, 11:06 AM	#565 (permalink)
GeeWizzItsMe See Golden Compass Join Date: Jul 2007 Location: Nashville Posts: 1,857 View Gallery Karma Komment	Re: Here We Go Again! 7-23-07 9-07 You win! __________________ VP of Dork Club http://www.reefsanctuary.com/forums/...-new-tank.html

09-16-2007, 12:28 PM	#566 (permalink)
Craig Manoukian Regular Guy Moderator Join Date: Nov 2003 Location: Marina Del Ray, CA Posts: 18,352 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Way cool progress! __________________ Currently tankless. 20 Gallon mini reef with mated pair of Maroon Clowns given to Rougiem! 80 gallon reef given to Rougiem/Wooster HS.

09-16-2007, 01:20 PM	#567 (permalink)
Melanie Golden Moray Join Date: Jun 2007 Location: Naples, Florida Posts: 2,120 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Did my tank maintenance today. Thought I'd share some photos and test results. Test Results Today @ Noon Temp 78 SG 1.027 (little too high. will slowly lower with water changes) Mg 200 (way too low. need to supplement) Ph 8.3 Nitrite 0 Ammon. 0 dKH 11 Ca 520 (too high but adjusting with water changes and hopefully Mg suppl.) Nitrate 0 Phos 0 The view under my tank. New ATO Phosban Reactor with carbon New Hydor Koralia PH. I LOVE it! Going to replace my sweeping PH with these. New refactometer. __________________ My Reef Journey Latest Recap My Videos My Flickr Photos Pres. of Dork Club I love ScubaDrew and North East Coral! Read why HERE...

09-16-2007, 01:47 PM	#568 (permalink)
Craig Manoukian Regular Guy Moderator Join Date: Nov 2003 Location: Marina Del Ray, CA Posts: 18,352 View Gallery Karma Komment Add yours!	Re: Here We Go Again! Woohoo Mel, great stuff, and nice work! My refractometer is just like yours! __________________ Currently tankless. 20 Gallon mini reef with mated pair of Maroon Clowns given to Rougiem! 80 gallon reef given to Rougiem/Wooster HS.

09-16-2007, 07:45 PM	#570 (permalink)
DrHank Golden Moray Join Date: Apr 2007 Location: Crestview, FL Posts: 2,284 View Gallery Karma Komment	Re: Here We Go Again! I agree with Lorraine. I never trust a reading that is way off. The first thing I do is clean up the test vial with DI water and then carefully redo the test. If it's still not right I get a hold of someone in my reef club and take a water sample. If your retest comes up like the first. your test reagents are probably bad. __________________ Doc Dr Hank's 210 Build: http://www.reefsanctuary.com/forums/...nks-tanks.html

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