Reef Chemistry Question of the Day #236 Additive Math

[Randy Holmes-Farley]

Reef Chemistry Question of the Day #236

Let's do some additive math.

You have a calcium supplement that says 20 ml raises calcium by 30 ppm in 10 gallons.

How much is needed to boost calcium by 20 ppm in 120 gallons of aquarium water?

a. 40 mL
b. 80 mL
c. 120 mL
d. 160 mL

Good luck!







































.

 

[CNDReef]

B I think

 

[AlexStinson]

D

 

[Florida Sunshine]

D

 

[dbl]

D

 

[filbie70]

D

 

[Yuki Rihwa]

20 ml to get 30 ppm in 10G

240ml to get 30 ppm in 120G

ml? to get 20 ppm in 120G

=160ml

Asian math so I'm sorry if you don't understand LOL

 

[Pongo]

E. 158.4 ml

 

[IslandLifeReef]

D

 

[MnFish1]

Reef Chemistry Question of the Day #236

Let's do some additive math.

You have a calcium supplement that says 20 ml raises calcium by 30 ppm in 10 gallons.

How much is needed to boost calcium by 20 ppm in 120 gallons of aquarium water?

a. 40 mL
b. 80 mL
c. 120 mL
d. 160 mL

Good luck!
.

20 ml raises Ca by 30 ppm/10 gallons
20 x (20/30) = ml to raise Ca by 20ppm/10 gallons = 13.34 ml.
So 13.34 ml raises CA by 20 PPM in 10 gallons

(120 gallons/10 gallons =12)*13.34= 160 ml. = D

 

[Randy Holmes-Farley]

And the answer is...

You have a calcium supplement that says 20 ml raises calcium by 30 ppm in 10 gallons.

How much is needed to boost calcium by 20 ppm in 120 gallons of aquarium water?

d. 160 mL

The manganese fish showed the math in the previous post.

Happy Reefing.