Water Volume Increase = Decrease in dKH consumption?

[Daniel91]

I recently upgraded my IM10 to IM20.

In the IM10, I saw a weekly consumption of ~1dKH

Now in IM20, I see a weekly consumption of ~0.3dKH (exact same frags and a few additional)

No other changes in light schedule, feeding etc.

Sure the corals are probably getting settled in before initiating full consumption for growth but would the increase in water volume have any say?

 

[W1ngz]

Makes sense, since we can assume the amount the corals take is the same, though the disturbance from moving may have them less than happy so maybe a little less than usual.

The total amount of available carbonate in the water has ~doubled, so what the corals remove is less when you compare it to the total available.

 

[W1ngz]

An analogy that's less sciency because I'm bored...

If you have 3 cookies, and I steal one, you definitely notice because now you only have two cookies.
If you had a jar full of cookies and I stole one, I'd still get a cookie, but you probably wouldn't notice.

 

[Randy Holmes-Farley Verified Community Expert]

What is the volume difference?

if it is 3x higher now, that is purely the volume effect. If it is less than 3x volume, the effect is something else, such as the disruption due to the move.

 

[adromero]

I originally did not post the thread but W1ngz’s analogy makes it a lot easier to understand. I am not the best with the scientific explanations.

 

[Daniel91]

Thanks all - it would make sense that double the water volume has the same corals seemingly have ALK consumption being under half the ALK than before -

Parameters are ok and all corals thriving, so I am not complaining.