CO2 and large tanks with sumps

[PeterGwee]

Since your degas level of CO2 is 6.8-6.9, your amount of CO2 which is optimal to hit ~30ppm should be in the range of 5.8-5.9 and 6.0-6.1 could well be ~20-25ppm or below. At 2w/g of light might be fine but not at higher light. The constant growth of BBA is a good indicator things are not well if you remove the previous infection in the first place.

Regards
Peter Gwee

[neon]

Since your degas level of CO2 is 6.8-6.9, your amount of CO2 which is optimal to hit ~30ppm should be in the range of 5.8-5.9 and 6.0-6.1 could well be ~20-25ppm or below. At 2w/g of light might be fine but not at higher light. The constant growth of BBA is a good indicator things are not well if you remove the previous infection in the first place.

Regards
Peter Gwee

Peter,
How can you tell the upper limit is ~30ppm , I thought there is no limit in term of CO2 PPM ? If there is a limit, by increasing the CO2 count would not cause the fauna gasping for air ? What does the gasping air mean ? High CO2 PPM , right ?

[PeterGwee]

Base on research data, 30ppm is the max saturation level for the rubisco. Don't get what you mean there by no limit in terms of CO2 ppm. How much you inject can be controlled and should be controlled around 30-35ppm. Above 40-50ppm, your critters are likely to exhibit erratic behaviour. If your critters are gasping for air, they are either low on O2 or the CO2 is way too high. High CO2 "blocks" respiration....check on fish respiration on the web.

I think you can do your way of CO2 injection since you either do not believe what I say or does not understand what I am trying to say.

Regards
Peter Gwee

[hii]

Why not start a new thread on this CO2 topic think out of topic from Nicky thread.

[ranmasatome]

high co2 and constant co2 are totally different issues.. pls note.

[neon]

Base on research data, 30ppm is the max saturation level for the rubisco. Don't get what you mean there by no limit in terms of CO2 ppm. How much you inject can be controlled and should be controlled around 30-35ppm. Above 40-50ppm, your critters are likely to exhibit erratic behaviour. If your critters are gasping for air, they are either low on O2 or the CO2 is way too high. High CO2 "blocks" respiration....check on fish respiration on the web.

I think you can do your way of CO2 injection since you either do not believe what I say or does not understand what I am trying to say.

Regards
Peter Gwee

Peter ,

Pl don't get me wrong here. I am just have some doubt as I found some of the term contradict. On one hand , you mentioned there is a max CO2 ppm saturation of 30ppm, on the other hand the Co2 ppm is rising and causing the critter to gasp for air if injecting too much. What I am trying to establish some Co2 ppm level slightly higher before lighting period (without causing critter to grasp for air), and Co2 ppm will reduce during lighting period but still higher than 30ppm (as the CO2 PPM measurement is no longer valid due many factor).