When do you dose your 2 part?

When do you dose?


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Crabs McJones

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I'm sure this has been discussed until were blue in the face before. But I'm curious as to when everyone doses their 2 part solution. In the morning, afternoon, evening, middle of the night? Is there a preferred time to dose? I like to dose mine in the morning before the lights come on because I like to think then the corals have access to the higher calcium and alkalinity levels during the day. However, from what I understand, most sps build their skeletal structure during the night. So should I be dosing at night before the lights turn off?
Wondering what everyone else's thoughts are on the subject.
Thanks :)
 
Last edited:
If I was dosing one, I'd dose the alk part to match alk demand, which I would determine, but which may be mostly during the day.

I don;'t think it matters when or how often the calcium part is dosed as I don't think the particular value is very important.
 
After a few weeks of running an alk controller and looking at hourly values, I noticed a large drop during the last few hours of the light cycle lasting several hours after lights out, and then a spike in the morning. This was with constant hourly dosing, showing me that demand is highest during the evening/early night and drops to near zero in the morning.

So if I had to pick, I would dose alk in the evening.
 

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