*Oxygen* - Page 2

Woodstock · 09-06-2006, 08:28 PM

Okay... one hour after the MH went off (PC's were still on) at a temp of 79.5 f and a salinity of 35ppt, the oxygen tested at 5.4 ppm. I was hoping it would be higher than that since it is after the strongest photosynthesis period? I will test again in the morning prior to the PC's coming on.... and probably test it during mid MH period (@3pm) this weekend.

Boomer the "Marine Science Studies Laboratory Manual" is very informative!

Boomer · 09-07-2006, 12:48 AM

Boomer the "Marine Science Studies Laboratory Manual" is very informative!

79.5 f and a salinity of 35ppt, the oxygen tested at 5.4 ppm

You are at about 84 % saturation. 100% is about 6.4ppm

Us this for a really close reading

http://www.aquanic.org/images/tools/oxygen.htm

The formula in your new book is a more accurate measurement. The best measuremnts are baromteric pressure (book), which are better than altitude (above link).

100% tables @SSTP (760 mm Hg column)
http://www.engineeringtoolbox.com/ox...ter-d_841.html

Woodstock · 09-07-2006, 10:44 AM

Thanks!

I was surprised when I tested it this morning (prior to the lights coming on)... 6am, temp was 78.5, 35ppt salinity, the oxygen tested at 5.7 ppm.

I do have a lighted refugium (24/7) that is filled with chaeto and other types of macro algae that would help keep the oxygen higher during the night hours.... and the temp was one degree less.

I can't wait to test it mid-day this weekend!

Dragon Wrasse · 09-07-2006, 04:46 PM

Nice thread, thanks for all the great info....

Woodstock · 09-07-2006, 06:34 PM

Hey Dragon!

Well, being the unpatient person I am, I made time to test the tank today after the MH were on for 7 hrs; 80.2 f, 35 pptsalinity, 6.4 ppm oxygen.

Quote:

Dissolved Oxygen

Oxygen is critical to the survival of aquatic plants and animals, and a shortage of dissolved oxygen is not only a sign of pollution, it is harmful to the fish. Some aquatic species are more sensitive to oxygen depletion than others, but some general guidelines to consider when analyzing test results are:

5-6 ppm Sufficient for most species
<3 ppm Stressful to most aquatic species
<2 ppm Fatal to most species

The overal Oxygen tests were:

Wednesday(Sept. 6); 7:30 pm (1 hr after mh turned off) = 5.4 ppm @ 79.5 f
***tweaked the flow to create more surface turbulence***
Next morning tested:
Thursday(Sept.7); 6:00 am (only fuge light on) = 5.7 ppm @ 78.5 f
Thursday(Sept. 7); 5:30 pm (MH on for 7 hrs) = 6.4 ppm @ 80.2 f

Not bad!

I will perform the same tests on my 30 cube just for a comparison... fun, fun!

billyr98 · 09-07-2006, 06:49 PM

very good thread Doni!

Boomer · 09-12-2006, 12:46 AM

Donia

5:30 pm = 6.4 ppm @ 80.2 f

Something funny here. How come ? Lights out at 6:30 PM. 1 ppm in 2 hrs is a big loss. Maybe bad test ?

Woodstock · 09-12-2006, 08:33 AM

Sorry, the order of testing was off. I edited the above post to show the correct chain of testing.

Quote:

The overal Oxygen tests were:

Wednesday(Sept. 6); 7:30 pm (1 hr after mh turned off) = 5.4 ppm @ 79.5 f
***tweaked the flow to create more surface turbulence***
Next morning tested:
Thursday(Sept.7); 6:00 am (only fuge light on) = 5.7 ppm @ 78.5 f
Thursday(Sept. 7); 5:30 pm (MH on for 7 hrs) = 6.4 ppm @ 80.2 f

I will run another series of tests at the same times for comparison.

Boomer · 09-12-2006, 01:32 PM

OK there gal, that makes sense

Woodstock · 09-12-2006, 01:35 PM

By the way... you get an A+ on that test.....LOL!

Boomer · 09-12-2006, 03:15 PM

I figured you might be testin' me. I was giong to ask you "is this a test"

boozeman · 09-12-2006, 06:56 PM

09-06-2006, 08:28 PM	#16 (permalink)
Woodstock The Wand Geek was here. ;) Join Date: Nov 2003 Location: North Carolina Posts: 26,106 View Gallery Karma Komment Add yours!	Re: Oxygen Okay... one hour after the MH went off (PC's were still on) at a temp of 79.5 f and a salinity of 35ppt, the oxygen tested at 5.4 ppm. I was hoping it would be higher than that since it is after the strongest photosynthesis period? I will test again in the morning prior to the PC's coming on.... and probably test it during mid MH period (@3pm) this weekend. Boomer the "Marine Science Studies Laboratory Manual" is very informative! __________________ ~Doni Marie~ *GOT ICH???* *My Victorious Battle with ICH* 120 Reef Chronicle ~ *60 Gallon Snowcasso cube* *Breeding Picasso Clownfish~* *Picasso & Snowcasso for sale~* "Energy and persistance conquer all things." Benjamin Franklin __________________________________________________ ______________________________________________

09-07-2006, 12:48 AM	#17 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,769 View Gallery Karma Komment	Re: Oxygen Boomer the "Marine Science Studies Laboratory Manual" is very informative! 79.5 f and a salinity of 35ppt, the oxygen tested at 5.4 ppm You are at about 84 % saturation. 100% is about 6.4ppm Us this for a really close reading http://www.aquanic.org/images/tools/oxygen.htm The formula in your new book is a more accurate measurement. The best measuremnts are baromteric pressure (book), which are better than altitude (above link). 100% tables @SSTP (760 mm Hg column) http://www.engineeringtoolbox.com/ox...ter-d_841.html __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.

09-07-2006, 10:44 AM	#18 (permalink)
Woodstock The Wand Geek was here. ;) Join Date: Nov 2003 Location: North Carolina Posts: 26,106 View Gallery Karma Komment Add yours!	Re: Oxygen Thanks! I was surprised when I tested it this morning (prior to the lights coming on)... 6am, temp was 78.5, 35ppt salinity, the oxygen tested at 5.7 ppm. I do have a lighted refugium (24/7) that is filled with chaeto and other types of macro algae that would help keep the oxygen higher during the night hours.... and the temp was one degree less. I can't wait to test it mid-day this weekend! __________________ ~Doni Marie~ *GOT ICH???* *My Victorious Battle with ICH* 120 Reef Chronicle ~ *60 Gallon Snowcasso cube* *Breeding Picasso Clownfish~* *Picasso & Snowcasso for sale~* "Energy and persistance conquer all things." Benjamin Franklin __________________________________________________ ______________________________________________

09-07-2006, 04:46 PM	#19 (permalink)
Dragon Wrasse Harlequin Tuskfish Join Date: Dec 2005 Location: Southern California Posts: 991 View Gallery Karma Komment	Re: Oxygen Nice thread, thanks for all the great info.... __________________ *Member "Crabs Are Evil" Society* "A wise man learns more from a foolish question, then a fool learns from a wise answer" - Bruce Lee _____________________________ 75 gal SeaClear II Reef Tank (softy tank) - Coralife 125 Super Skimmer - Little Giant 2-MDQX-SC - Angstrom 2537 UV 15W - HOB Refugium - Eheim Pro 2228 - Red Sea Wave Maker w/Maxi-Jet 600 (X4) - 100 lbs Live Sand (DSB) - 100 lbs Live Rock - 260W PC lighting - 470nm lunar lights (X15) - AquaController II Custom 75 gal Starphire glass tank (SPS/LPS tank) - Custom 24 gal Refugium - Tuzne Wave box - JBJ Chiller - 390W PC lighting - 175W MH (X2) - Knop Cal. Reactor - AquaController 3 Pro - Aqua C Skimmer - Phosban Reactor - 18W Turbo-twist UV sterilizer - Sump - Sony Computer 5 gal Nano Hospital Tank - Eheim 2213 - Red Sea Prizm Skimmer - Live sand - Live Rock - Built in Refugium - 36W PC lighting

09-07-2006, 06:49 PM	#21 (permalink)
billyr98 Reefing Addict Join Date: Nov 2005 Location: Cherry Hill, NJ Posts: 5,409 View Gallery Karma Komment Add yours!	Re: Oxygen very good thread Doni! __________________ Billyr98 - I'm BACK!! -

09-12-2006, 12:46 AM	#22 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,769 View Gallery Karma Komment	Re: Oxygen Donia 5:30 pm = 6.4 ppm @ 80.2 f Something funny here. How come ? Lights out at 6:30 PM. 1 ppm in 2 hrs is a big loss. Maybe bad test ? __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.

09-12-2006, 01:32 PM	#24 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,769 View Gallery Karma Komment	Re: Oxygen OK there gal, that makes sense __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.

09-12-2006, 01:35 PM	#25 (permalink)
Woodstock The Wand Geek was here. ;) Join Date: Nov 2003 Location: North Carolina Posts: 26,106 View Gallery Karma Komment Add yours!	Re: Oxygen By the way... you get an A+ on that test.....LOL! __________________ ~Doni Marie~ *GOT ICH???* *My Victorious Battle with ICH* 120 Reef Chronicle ~ *60 Gallon Snowcasso cube* *Breeding Picasso Clownfish~* *Picasso & Snowcasso for sale~* "Energy and persistance conquer all things." Benjamin Franklin __________________________________________________ ______________________________________________

09-12-2006, 03:15 PM	#26 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,769 View Gallery Karma Komment	Re: Oxygen I figured you might be testin' me. I was giong to ask you "is this a test" __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.

09-12-2006, 06:56 PM	#27 (permalink)
boozeman The CodFather ~ Join Date: Apr 2006 Location: new york Posts: 8,802 View Gallery Karma Komment Add yours!	Re: Oxygen __________________ ...and when I'm old and wise little things mean little to me like autumn winds they'll blow right through me and someday, in the mist of time when they ask you if you knew me remember that you were a friend of mine

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