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10-14-2008, 12:01 PM
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#32 (permalink)
| | 3reef Sponsor
Join Date: Aug 2008
Posts: 318
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Quote:
Originally Posted by Jason McKenzie  I have heard many a horror story about people's tanks experiencing issues when switching salt brands.
I can't see anything in your latest tests that would cause death to an invert, fish or coral.
Low ALK isn't going to kill anything. | agreed  no red flags going up from your parameters.
Just giving you some insight as to a round about way to find either alk, mag or calcium if you only have two out of the three test kits available. Keep in mind the math is just theory and like most math that is applied to real world situations...it is just a close estimation.
The tests that would pose the biggest issues to corals and/or inverts would be po4, and no3. Then the obvious nh3/nh4+ and no2. | 
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10-14-2008, 12:19 PM
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#33 (permalink)
| | Coral Banded Shrimp
Join Date: Jul 2008 Location: I live on the Nature coast of Fl
Posts: 378
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Sue, I just use the dkH #--that's what is usually given and you don't have to do any math. It's the same as the # of drops you use and it should be between 8 and 12. I know that some people keep it higher, but this works for most things. To raise it you can use 1 teaspoon of baking soda per 50 gallons [ mix with tank water an add slowly] don't raise it too much at once. | |
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10-14-2008, 12:48 PM
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#34 (permalink)
| | Flamingo Tongue
Join Date: May 2008 Location: Salem, Oregon
Posts: 110
 
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Quote:
Originally Posted by That Guy for anyone good at chemistry please correct me if i am wrong
here are constants used.
Ca - Equivalent Weight = 20.04
Mg - Equivalent Weight = 12.15
CO3 - Equivalent Weight = 30.004
CaCO3 - Equivalent Weight = 50.045
Given Info:
Ca = 480ppm or 480 mg/L
alk = 6 dkh or 107.4 ppm, or 2.15 meq/l
So with the number you gave here is how i found you to have a low magnesium level.
CaCO3 due to Ca is found by
(480 x 50.045) / 20.04 = 1198.683mg/l
so
(1198.683mg/l) / 50.045 = 23.952 meq/L
so
(23.952 meq/l) / 50.045 = .4786 meq/l
Since we found that 480 ppm of calcium will equal 23.952 meq/L we can than find Magnesium
107.4 - 23.952 = 83.448
so we can than find
23.952 / 50.045 = . 4786
and
83.448 / 50,045 = 1.667
so
(.4786 + 1.667) x 50 = 107.3ppm
So to find the estimated concentration of magnesium in the system you would take
83.448 x 12.15 = 1014.31 ppm | GOOD GOD........Who are you? You just knocked me off my friggin chair!!  You must be a darn genius   Wow, really, that really impresses me! I'm terrible with math. Thank you, I believe I might be low in magnesium. How do I increase that?
Sue
_________
46 gal.BF 75#LR 40#LS 2 maxi-jet PH's, heater, a noname skimmer. 36" Current Sunpod 2-150w MH 14k with lunars. 3 blue-green chromis, 2 maroon clowns, 1 lawnmower blenny, 1 fire shrimp, 1 Peppermint shrimp, 6 various snails, 2 sandsifting starfish, 1 cucumber. GSP, Orange Monti, Purple Digi, Pink spaghetti leather, Yellow Sun coral, various shrooms, Purple clove polyp, various colored button polyps, Toadstool leather and a beautiful maroon SPS I can't remember the name of. Born 5-23-2008 | |
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10-14-2008, 12:59 PM
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#35 (permalink)
| | 3reef Sponsor
Join Date: Aug 2008
Posts: 318
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You can just go to CVS or any local pharmacy/supermarket and pick up some epsom salt. | |
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10-14-2008, 01:02 PM
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#36 (permalink)
| | 3reef Sponsor
Join Date: Aug 2008
Posts: 318
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Quote: |
GOOD GOD........Who are you?
| I'm just That Guy | |
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10-14-2008, 01:04 PM
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#37 (permalink)
| | Flamingo Tongue
Join Date: May 2008 Location: Salem, Oregon
Posts: 110
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And.........?? Can you figure an amount for 47 gallons, math genius ? I just luv that brain of yours!
Sue | |
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10-14-2008, 01:14 PM
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#38 (permalink)
| | 3reef Sponsor
Join Date: Aug 2008
Posts: 318
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well there are other factors that come into play with real world situations that have effect om CaCO3 other than just magnesium and calcium. So that number is just an estimate... but you can add like 3 ounces of epsom salt a day for 6 days should bring you to around 1300 ppm. But i cant stress enough that the number i came up with is not exact!! so, its best to get a magnesium test kit and then figure out how much to add.
Although i would like to know how close i am with that math haha! | |
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10-14-2008, 01:20 PM
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#39 (permalink)
| | Peppermint Shrimp
Join Date: Feb 2008 Location: Rio Linda, California
Posts: 427
  
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Not to be stealing "that guys" thunder...his equations are absolute..but....YOU NEED A GROUND PROBE. It is essential and not negotiable..under 5.00 and well worth it.
It will eliminate future troubles....and take another question mark out of the trouble shooting process. : )
With so many other things to worry about this is great piece of mind.
If you have already purchased one...my bad...It looked like in your thread it had not been done yet. : )
Good luck suzique
LG _________ BORN 11-22-07 - 30 Gal. ** RE-BORN 11-10-08 - 55 Gal. | |
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10-14-2008, 01:32 PM
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#40 (permalink)
| | Flamingo Tongue
Join Date: May 2008 Location: Salem, Oregon
Posts: 110
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Quote:
Originally Posted by lillys Grandad Not to be stealing "that guys" thunder...his equations are absolute..but....YOU NEED A GROUND PROBE. It is essential and not negotiable..under 5.00 and well worth it.
It will eliminate future troubles....and take another question mark out of the trouble shooting process. : )
With so many other things to worry about this is great piece of mind.
If you have already purchased one...my bad...It looked like in your thread it had not been done yet. : )
Good luck suzique
LG | No one could steal "That Guys" thunder  I'm completely dazzled!  But yes, be assured, I WILL purchase a ground probe Thank you for your mentoring
Sue | |
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