Chronically bored math guys.

Sally Js having a hard day and doesnt want to go anywhere. Her PH is off on the 75 gal aquarium by about .8. (The only way to solve is to adj PH for this problem.)
She has a 10kgal pool and uses 1 qt 31.9 % acidity muriatic acid to lower ph .5.
How much very diluted (diluted in 20 gals of saltwater) muriatic acid does she use?
If shes contemplating using garden vinegar of 20% acidity: What is the adjuster?
She wants the PH to read 7.2 it is now 8.2
Discuss
Hints:
Problem starts 75/10k.
Solution is in drops.
Ill answer good question about the problem.
Extra credit for finding the trick to the question.More hints: Its not the fish will die.
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Bicycle Chain
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Do your own damn homework.
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On 3/12/2012 6:30 PM, Doug Miller wrote:

Kid could probably figure it out from this table:
http://www.erowid.org/archive/rhodium/chemistry/equipment/molarity.html
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The answer is always 18.
Harry K
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wrote:

What galaxy are you in? In this one the answer is always 42. ;-)
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