Solid .2 ph drop over night after a/c turned on

[((FORDTECH))]

As title states last night I turned on my ac for first time this year and when woke up this morning ph is at 7.9 and always runs at 8.1-8.2 I know this is not out of range or something I should immediately be concerned about but I’d like to know why this happened. I do have my skimmer line plumbed to outside air and before I ran line outside my ph was 7.9 and went to 8.2 after this modification. Now I’m back at 7.9 I don’t understand why any info And clarification would be appreciated Thanks

 

[Copingwithpods]

Have you checked your line for a clog?

 

[vetteguy53081]

Quite expected. It will drop according to light and temperature.

 

[((FORDTECH))]

Have you checked your line for a clog?

No way could be clog 2 half inch lines into 1 1/2 inch pvc. That can’t clog

 

[((FORDTECH))]

Quite expected. It will drop according to light and temperature.

Yes temp was 84 in the house before turn on and 74 in house when woke up

 

[((FORDTECH))]

Quite expected. It will drop according to light and temperature.

But with that being said last week house was 68-74 and ph was solid 8.2

 

[Copingwithpods]

No way could be clog 2 half inch lines into 1 1/2 inch pvc. That can’t clog

Still worth checking, a bug, mouse, lizard can easily clog that up

 

[((FORDTECH))]

Still worth checking, a bug, mouse, lizard can easily clog that up

I will take a look should be very easy and quick to rule out

 

[vetteguy53081]

But with that being said last week house was 68-74 and ph was solid 8.2

Generally when light s are off , there is a slight drop. At 68-74 as you mentioned, the air is a little more dense, less humid.

 

[WIReefer]

I also turned on my ac last night and my ph also dropped lower than normal.

 

[((FORDTECH))]

I also turned on my ac last night and my ph also dropped lower than normal.

Can you show me you graph for ph

 

[WIReefer]

Can you show me you graph for ph

Graph

 

[((FORDTECH))]

Generally when light s are off , there is a slight drop. At 68-74 as you mentioned, the air is a little more dense, less humid.

I have a huge 2000$ dehumidifier which is needed when over 600 gallons of saltwater is running that is set at 47% and is always on Nothing has changed so my humidity really has not changed for months

 

[((FORDTECH))]

I was thinking some kind of electrical charge in the air and then I guess yes charge would change from the change in humidity ? Who knows just wish I could do something about it. I don’t remember such a drop last year. And will it eventually balance itself out back to the 8.2 ? Orrrrr Actually what I really think is going on now that I talk out loud is could the now hot and humid air outside being drawn threw my skimmer be the cause of ph drop?

 

[((FORDTECH))]

Has anyone done research on how efficient skimmmer plumbed outside during hot humid summers are compaired to cold dry winters or just decent cool weather?

 

[Joedubyk]

Why not a co2 scrubber? Im pretty sure they're way mor effective then plubming your skimmer outside

 

[dwest]

I see this too, I have never seen an explanation that makes sense to me. Since carbon dioxide is more dense than nitrogen and oxygen (the most abundant molecules in air), I am wondering if the circulation caused by AC is contributing to this. It doesn’t add up in my mind. My sump is in the basement, my main tank is on the main floor, and my skimmer‘s air is being pulled from the outside. It seems that any circulation issues would balance themselves out.

 

[((FORDTECH))]

Why not a co2 scrubber? Im pretty sure they're way mor effective then plubming your skimmer outside

They also cost a lot for the media and then there is adding another chore to do. Up till now solid 8.2 was perfectly great

 

[((FORDTECH))]

I see this too, I have never seen an explanation that makes sense to me. Since carbon dioxide is more dense than nitrogen and oxygen (the most abundant molecules in air), I am wondering if the circulation caused by AC is contributing to this. It doesn’t add up in my mind. My sump is in the basement, my main tank is on the main floor, and my skimmer‘s air is being pulled from the outside. It seems that any circulation issues would balance themselves out.

This is exactly my setup aswell. Also you say wondering about the circulation from the ac well my heater is circulated the same way and was running just 2-3 days ago with no issues and 8.2 ph . Then heat off for 2 days then ac on and this drop

 

[((FORDTECH))]

I’m starting to think it’s not fact of ac turning on but more of fact of the change in outside temp and humidity going threw out outside skimmer inlets and we only associate this with turning ac on possibly. But again I’m no professional and probably wrong