sfsuphysics
Supporting Member
Sounds like that's exactly what the solenoid is used for, as there's always going to be CO2 in the air, and that amount will not change, but you get diminishing returns as far as your pH is concerned.
Just curious, but did you try and run a tube from your skimmer outside to get fresh air? I'd be interested in seeing the difference in the pH between the 3 different situations (normal, fresh air, and scrubber).
Just curious, but did you try and run a tube from your skimmer outside to get fresh air? I'd be interested in seeing the difference in the pH between the 3 different situations (normal, fresh air, and scrubber).
Do you know what your pH was before doing that?i drilled a hole to the outside and let my skimmer drawl in air. it's been keeping my ph at 8.3
I'm a bit skeptical about how doubling the two-part amounts mean that growth is doubled. I'm a newbie, but could this be confounded by the pH changes?
Rooster, we have that vent too, but it's because new homes are sealed so tightly that items like range hoods and bathroom fans can create negative pressure and once a threshold is reached the vent equalizes the pressure. I don't think it'll do much for reducing your ambient CO2 .
Came across this article that may lend some validity to BRS' claim. http://bio.biologists.org/content/3/6/489
Under lighted (daytime) conditions. "At 100% oxygen saturation, calcification rates were 178% higher at a pH of 8.4 as compared to 8.1" for A. millepora. However, the article claims that pH has minimal effect during dark conditions, but there is "a 50–75% decrease in calcification rates at hypoxia (30% oxygen saturation) as compared to normoxia (100% saturation)". Their pH was controlled using pH buffers, but in our reef tanks, we know that increasing O2 saturation in water at night increases our pH, so I think we can safely assume that an increase in pH for us at night, increases our oxygen saturation levels which will at least prevent a decrease in calcification.
There was nothing mentioned about hypoxia during daytime situations.
Came across this article that may lend some validity to BRS' claim. http://bio.biologists.org/content/3/6/489
Under lighted (daytime) conditions. "At 100% oxygen saturation, calcification rates were 178% higher at a pH of 8.4 as compared to 8.1" for A. millepora. However, the article claims that pH has minimal effect during dark conditions, but there is "a 50–75% decrease in calcification rates at hypoxia (30% oxygen saturation) as compared to normoxia (100% saturation)". Their pH was controlled using pH buffers, but in our reef tanks, we know that increasing O2 saturation in water at night increases our pH, so I think we can safely assume that an increase in pH for us at night, increases our oxygen saturation levels which will at least prevent a decrease in calcification.
There was nothing mentioned about hypoxia during daytime situations.
Well O2 saturation and CO2 removal are two different thing though? AFAIR from fuzzy chemistry, having more of one gas saturated doesn't mean less of another gas. That is why in planted tank we can have high level of CO2 saturation and have max O2 saturation (pearling) at the same time.
Thanks Randy. I have to say that I love my CO2 scrubber, so much so that I ordered a second to line up in series and get more out of each canister. SPS are doing great and encrusting nicely, and in putting in a good amount of ca and alk for those little frags. Highly recommend if you can't get outside air easily. Also I have the solonoid but have not used it. I don't really go above 8.3 so no need to shut off the scrubber.
You must have better air over there in the east bay.I'll keep it in mind if I ever have the need, but I've been pretty lucky so far and my pH stays in the range of 8.2-8.35 throughout the day unless I have a number of people over for at least a few hours.
You must have better air over there in the east bay.
You must have better air over there in the east bay.
I think we're all feeling that pain. $$Or I just have a bunch of holes in my house. Maybe that's why my heating bill was so expensive that last couple of months!