Ph control skimmer code?

[Reef man 89]

Is it possible to have my skimmer run off of my PH probe readings. For example if ph over 8.31 then off then if ph under 8.25 then on. I ask because I have a co2 reactor and have it set up to be a recirculating reactor and is working almost to well. My ph will climb to 8.35. Didn’t know if this came be done and if so what would the code be. Thank you

 

[SuncrestReef]

Yes. Use this code on your skimmer output:

Fallback OFF
If pH < 8.25 Then ON
If pH > 8.31 Then OFF

 

[Reef man 89]

Yes. Use this code on your skimmer output:

Fallback OFF
If pH < 8.25 Then ON
If pH > 8.31 Then OFF

Thank you now I see what I did wrong I didn’t use the greater or less then symbol.

 

[SuncrestReef]

Thank you now I see what I did wrong I didn’t use the greater or less then symbol.

No problem. If you're interested in more Apex programming tips, see my 8-part Apex tutorial series: https://www.reef2reef.com/threads/neptune-apex-programming-tutorials.700483/

 

[Reef man 89]

Ok what am I doing wrong my ph right now is 8.29 I add the code but didn’t work

 

[Reef man 89]

Any ideas @SuncrestReef

 

[SuncrestReef]

Is the skimmer on or off? With the pH at 8.29, it's within the range you specified, but if it has not yet gone below 8.25 the skimmer will not turn on. If it did get that low and turn on, the skimmer will remain on until the pH goes above 8.31.

Also, the Defer 005:00 Then ON will cause it to wait 5 minutes before turning the skimmer on once the pH goes below 8.25. During this time, the pH must remain below 8.25 the whole time, otherwise the timer will reset and start over once the pH again goes below 8.25.

 

[Reef man 89]

That's why the defer 5.00 minutes I didnt account for that. I thought that would only apply to my feed mode. It all good it works. Man I feel like an idiot still in the learning process. I did read your folder on different was to use the apex and found that really helpful. I greatly appreciate your help

 

[Reef man 89]

So the code for the ph to turn skimmer on and off works great. but now when I press feed mode A it will not turn off like the rest of my gear. Do you see anything wrong with the code?

 

[Reef man 89]

Bump

 

[Mbritt]

@Reef man 89 - im looking to do something similar. I have a software background but not done much with the Apex programming yet. What does the first piece of this code do. Specifically "If FeedA 005 then off"? I want the delay which is specified by Defer and that I understand but I dont know what FeedA is.

 

[Mbritt]

I added this code and absolutely nothing happens. Why? Currently PH is at 8.2 and I just wanted to test the code.

Fallback OFF
If pH > 8.15 Then OFF

 

[Mbritt]

I added this code and absolutely nothing happens. Why? Currently PH is at 8.2 and I just wanted to test the code.

Fallback OFF
If pH > 8.15 Then OFF

Figured this out lol. I didn't have my Skimmer set to Auto