OSC for dosers

[gummyworms]

Hello,

Hopefully a simple question:

I'd like to set my alk / calc dosers so that they are every other hour, but not the at the same time. This is my code:

Fallback OFF
Set OFF
OSC 000:00/001:30/118:30 Then ON
If pH > 08.50 Then OFF


How do I modify cody for one of them so they don't run at the same time?

Thanks!

[kenargo]

I am not certain I understand what you mean by "not at the same time"? If you mean every other hour of the day but not consistently at (for example) 10 am then you can have a sliding OSC by making sure the sum of the on+off is not an exact fraction of 24 hours (this will slide the time day to day as the OSC timer is based on a fixed time and not midnight).

If you mean something else please let me know.

Oh, you don't need the Set command (OSC does that for you), it doesn't hurt though.

[nystang]

If I'm not mistaken you should start the code for the other doser as
OSC 060:00/.....

[2k3sgm]

I'm assuming you want them to run for a minute 30 at the top of the hours?

Alk
Fallback OFF
OSC 000:00/001:30/118:30 Then ON
If pH > 8.5 Then Off

Calc
Fallback OFF
OSC 060:00/001:30/058:30 Then ON
If pH > 8.50 Then OFF

This will dose Alk at midnight and then the top of the even hours and Calc at 1 then the top of the odd hours.

[gummyworms]

Sorry to be confusing, what I meant was that I want to run:

Alk:
Midnight, 2am, 4am, 6am, etc.

Calc:
1am, 3am, 5am, 7am, etc.

Just so they are not running at the same time.


I had tried this statement:
OSC 060:00/001:30/118:30 Then ON

This was dosing once every 3 hrs, but I think I see my mistake now in that I have to account for the delay in the beginning in the 3rd part of the statement.

So this is correct:

OSC 060:00/001:30/058:30 Then ON

Is that the right way to think about it?

Thanks!

[gummyworms]

While we are on the subject...

Any thoughts on when are optimal times to dose alk / calc for maximum growth?

I was thinking of doing calc throughout the day, and alk at night to control pH swing, but I could be convinced otherwise :)