Search results

Ha, ok. No disrespect to Walt, but I don't know about that... ;)

Forgot to mention: If we want to get an alk:carbon ratio that comes right out to pH = 8.2 (thus, no change in pH) we can mix bicarbonate and carbonate at about a 7:1 ratio. Bicarboante is 1:1 and carbonate is 2:1. If we mix 7 parts bicarbonate to 1 part carbonate we get about a 1.13:1 ratio...

To refine points 3 and 4 a bit. At a pH = 8.20 (average ocean pH with today's level of CO2) the ratio of alkalinity:carbon is 1.13:1. There concentration of alkalinity is a bit higher than the concentration of carbon. For a pH of 8.2 we need a 1.13 alk:carbon ratio. If the ratio is higher on...

Ha, perhaps ;) There is a lot that CAN be known about these topics (and a lot that is still unknown to science), but if you understand a few basics you'll be fine. The most important things to get: 1. Higher alkalinity pushes pH higher. 2. Higher CO2 pushes pH lower. 3. Additivies with...

High density and low density bands are evident in a lot of corals (most obvious in massive corals--round ones--as compared to branching corals, but present all the way around). During the cool part of the year calcification drops, but linear extension tends to drop more, increasing skeletal...

Pssschhh, whatever.... Sooooo not forgiven ;) cj

Which is why I wrote this: "The effect of any of these additive systems on the chemistry of the tank is the same once we return to equilibrium with the atmosphere. Getting back to equilibrium may require many hours or even days. Since we are usually dosing our aquariums more often than that to...

Hmmmm, may I ask where you got this information? I'm not sure this is an entirely...factual interpretation ;) cj

Is it possible to get a sharper photo? The resolution isn't very clear, and the color seems 'off.' I can't see enough corallite detail to tell what this is. cj

In response to the questions Boomer brings up: At any given pH we have a given ratio for total alkalinity:total inorganic carbon. At normal seawater pH (8.20 on the NBS scale) this ratio is about 1.13:1. If our aquarium is at equilibrium with the air over it, the concentration of CO2 in the...

I've tried to do my best at answering the questions originally posted and getting back on track. Chase, I wrote a response above in the midst of...well, this. I'll copy here so that hopefully it is more visible. If you have any further questions, I'd be happy to answer them. Quote from...

Ok, that makes more sense, but it is worded poorly. A large portion of CO2 DOES in fact come out with the effluent. Actually, the pCO2 of most calcium reactor effluent is incredibly high--hundreds of times what's in the air. If it weren't the pH would shoot up an all the aragonite we just...

When you add any kind of inorganic carbon to water (assuming the pH isn't too high or too low) you will get all 4 species in solution. How much there is of each specie (relative proportion) depends on the pH. If you add baking soda (sodium bicarbonate) you will get CO2, H2CO3, HCO3-, and CO3--...

And to clarify, when I talk about the addition of baking soda lowering pH, this will be the effect on pH immediately after the baking soda is added. Given enough time eventually CO2 will be lost from the water (either to the atmosphere or to photosynthesis) and the pH ultimately will be higher...

This is the original post in this thread. So as to maintain some semblance of usefulness, and so as to get toward answering this person's questions I'd like to respond just to this original post. That all sounds about right. You can add the baking soda all at once. It will lower the pH from 8.4...

Carlo and Boomer, May I suggest that it may be best for the two of you not to respond to what the other has typed anymore. Right, wrong, or otherwise about whatever issue you are posting about, your posts aren't being effective at this point. The forum readers will not hear your comments...

So what then would you do to eliminate MORE TCO2 from the system? Seems to me that an outside air source is being provided, a skimmer which it hopefully off-gassing some and the drop from the 1st floor to the basement that creates its share of turbulance in the sump. Since it seems that I'm...

Also, my intent was to answer questions that were raised, though admittedly I did get a bit too far "out there" to be useful with some of what I posted. My appologies if this was not useful. As I said, I'd be happy to answer any questions. cj

Jeez guys, it's just a little bit of physical chemistry...what could be hard about that? ::) Anyone that ever took p-chem is laughing their butts off right now ;D I'll start this question by saying that I'm completely out of my league in this thread! But I have a burning question that I can't...

For your taste, Randy's, Habib's or a chemists yes, I would agree. If you were asking the questions you would have gotten the real deal I was not trying to drop a so called working model. For example for CO2 in FW I use this......... CO2 (in PPM) = 3xKH x 10(7-pH). Such is as you know is much...