I assume the co2 in house is higher due to it being more air tight and having more humans and possibly other animals in there.Took my CO2 scrubber offline last night to see what would happen.
So far to keep alk stable over the last 18ish hours it’s taken 38mls compared to 180 yesterday.
This got me thinking.
We know in my example that it was unlikely my corals were using 6 dkh when it’s mostly 20-30 sps frags.
I was unable to find precipitant in the usual spots.
Do you think it is possible while the CO2 scrubber is raising the PH of the tank generally, that the localized PH in the skimmer body is so high that there could have been abiotic precipitation in the skimmer and it is heading on up into the collection cup?
While I would like to keep PH above 8, do you think there are any solutions here?
My 125 in the garage which gets much less airflow ranges 8.1-8.2 day/night.
What could be generating additional CO2 that the other tank isn’t exposed to?
I would think ambient co2 would be higher in the garage where we work out. The only only thing I can think of is the ratio of livestock to water volume.
Would really like to hear your thoughts on some of this.
It’s been very strange. I have a feeling I’m going to loose a few frags this week. PH is in free fall right now. 8.2 at 7 and currently 8.04 right now. I suspect it will be 7.8 by the time I wake up. I am not sure why this tank is having these issues.I assume the co2 in house is higher due to it being more air tight and having more humans and possibly other animals in there.
I assume the garage is less air tight, so despite working out in there the air is mixed with outside more than in the house. Just a guess.
no clue on the ph being high in the skimmer causing stuff the precipitate. Seems like a good theory at least.
With dosing soda ash, my tank runs naturally from 7.8ish to 8.1-2ish almost daily, so that swing doesn't worry me. I would think the corals should handle that. And it might be harsh to say to the corals, but if they can't handle that minor swing, they are too sensitive and will die at the next minor swing. (Don't tell them I said anything to hurt their feelings though, I still care about them )It’s fell to 7.85 last night after ripping out the co2 scrubber.
Hasn’t been below 8 for about 9 months.
I think that your super high level was mostly abiotic consumption as was discussed above extensively, and your new lower level is your correct biotic consumption level. In other words, I don’t think it is putting your corals at risk.It’s fell to 7.85 last night after ripping out the co2 scrubber.
Hasn’t been below 8 for about 9 months.
Side note: it’s not the Ph directly that I think will kill things although I think it is going to go lower tonight given the trend which is concerning. It’s the fact that Alk dosing has gone from 180mls to 60ish.
pH of 7.9-8.25 is completely fine, is that the range without the scrubber? If so I wouldn’t bother with using it at all.So I wanted to update this after attempting to use my CO2 scrubber under the higher magnesium environment. Spoiler. I regret turning the CO2 scrubber back on and I’m still recovering from it even after shutting it off.
The CO2 scrubber is anecdotally linked to the instability I experience as nothing else has changed. Worth noting that while tests kits show magnesium in the 1400-1420 range. My ICP results this month show it much higher at 1498.
I will just post the alk results and leave my interpretation to a minimum. My sps prior to turning the scrubber back on were looking very healthy and showing some of the best growth I have seen in the last 6 months. I turn the co2 scrubber on, start monitoring alk hourly to compensate for the increased demand. Over the next 24 hours things deteriorated.
Alk Results week prior.
Next picture, see if you can spot where the reactor was turned on. It began fluctuating .2 -.5 PER HOUR with little consistency so it was hard to counteract with the doser.
I am going to try an air stone with the CO2 scrubber instead of in the skimmer. I think this lends support to my theory that the localized PH in the skimmer is getting too high because of the low supply of CO2 and this causing precipitation. Tank ph never gets above 8.4 with the scrubber attached. Naturally ranges 7.9-8.25 this week.
Either way, I am confident that under my specific scenario that the co2 scrubber with my skimmer has been a direct result of my precipitation issues in the past. I hope I can find a solution that will allow me to manage my PH in the 8.1-8.3 range.