Randy Holmes-Farley
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My Tank Thread
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Reef Chemistry Question of the Day #70
You have a soft coral tank that you have been keeping for about 2 years. It is doing quite well. You maintain calcium and alkalinity through water changes alone.
Right after your most recent water change the calcium is measured to be 440 ppm and the alkalinity is 9.0 dKH (3.2 meq/L).
After a few days without any water changes, the calcium has declined to 431 ppm.
Before you run your alkalinity test, you make a prediction. What should the alkalinity be?
Assume alkalinity dropped only due to calcification by coralline algae or other calcifying organisms in the tank, and that the measurements you made so far were perfectly accurate.
A. 6.9 dKH (2.5 meq/L)
B. 7.6 dKH (2.7 meq/L)
C. 8.1 dKH (2.9 meq/L)
D. 8.7 dKH (3.1 meq/L)
Good luck!
.
You have a soft coral tank that you have been keeping for about 2 years. It is doing quite well. You maintain calcium and alkalinity through water changes alone.
Right after your most recent water change the calcium is measured to be 440 ppm and the alkalinity is 9.0 dKH (3.2 meq/L).
After a few days without any water changes, the calcium has declined to 431 ppm.
Before you run your alkalinity test, you make a prediction. What should the alkalinity be?
Assume alkalinity dropped only due to calcification by coralline algae or other calcifying organisms in the tank, and that the measurements you made so far were perfectly accurate.
A. 6.9 dKH (2.5 meq/L)
B. 7.6 dKH (2.7 meq/L)
C. 8.1 dKH (2.9 meq/L)
D. 8.7 dKH (3.1 meq/L)
Good luck!
.
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