Brams, jag tror att du kan ha för lite CO2, trots att du har prob och controller. Dina bilder ser otroligt lika ut som hos en kille som klagar på nästan samma sak som du (på barrreport.com) och som också hävdat in i det sista att hans CO2 är perfekt med hjälp av controller. Om du har möjlighet, gå in på den här länken och läs den diskussion som förs mellan freemann och Tom Barr, se s. 7ff:
http://www.barrreport.com/forums/showthread.php?t=1824&page=5&pp=10&highlight=green+dust
Följande utdrag kan vara ganska illustrerande:
[quote=freemann]
Well one thing I know for sure is that it is not CO2 deficiency. I dump 6 Kg of CO2 every 20 days in this 100 gal tank (checked for leakages, none). Co2 defuses perfectly not a single bubble comes out form the output. There are almost 200 bubbles when the pinpoint ph controller works, plant start to bubble an hour if not right away after lights turn on. And the whole tank is like a campaign after 4-5 hours even the hairgrass bubbles. The kh is 8 and the ph meter turns off Co2 at 6.47 and on at 6.55 (I lowered the thresholds per you instructions last time we talked).
Tom it is not CO2 believe me. By the way yes I don't do the mist but all works so well on diffusion and mist requires new setup in this monster this is why I try to avoid it. It is something else.
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Something else also is the fact that together with the appearance of the [COLOR=#cc0000]dust[/COLOR] on the 3rd day after the wc film on glass thickens and other greenish spot crusty algae appear aswell.
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Hehe, det är alltid lika kul höra folk påstå att det inte är CO2.. :D
[quote=Tom Barr]
[quote=freemann]
Something else also is the fact that together with the appearance of the [COLOR=#cc0000]dust[/COLOR] on the 3rd day after the wc film on glass thickens and other greenish spot crusty algae appear aswell.
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Argh! Right there, that's a lack of cO2 given you add plenty of PO4.
Good old algae can tell a lot.
I'm virtually certain it's low CO2. Too many bioindicators suggest it.
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Och så fortsätter det vidare, där freemann envist hävdar i inlägg efter inlägg att det absolut inte kan vara CO2, medan Tom Barr ännu envisare påstår att det är CO2. Freemann får dock slutligen en nödastöt:
[quote=freemann]
Let me tell you my impressions though, Ph controller was adjusted down to 1.1 degrees from the degaused tank water, fish adjusted fine last night but after the switch off of the CO2 during the night, Ph was around 6,96 in the morning 11 am and this was when I switched on the controller and the distribution of CO2 (lights come on at 2 pm) by that time Ph was at the proper range but the fish were all in the surface aswell, took them more than 6-7 hours for all to leave for good the surface (charachids, gouramis do much better pencilfish seem to suffer most). So what are your suggestions of the on - off of the CO2 in relation to the lights? If I turn on CO2 when lights come on it will take 4 hours for the CO2 to come down which seems to me that makes it the same like having higher Ph (less CO2) continously (fish weren't stressed at least that much with less CO2 all the time.
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[quote=Tom Barr]
4 hours to drop the pH?
So how can the tank ever respond to increases and changes in the CO2 if it takes so long??????????
I knew this was CO2 all along and now I know it is.
Here's the problem: response times.
Even with the pH controller, it would take several hours to get the CO2 up and the control you actually is very poor.
That's why you have the stunting in some plants and the types of algae ypu have.
How to solve the issue?
More flow through the CO2 reactor, the higher and better mixed the water is going through that and also the more flow and evenness of the CO2 rich water coming into the tank, the better.
Even with your pH controller, the rate of response is still poor, which is why you still got algae even though the pH seemed okay.
If you use a pH controller/controlled system, it's always better to have a much greater over sized mixing pump and reactor relative tio the tank's volume and dimensions.
Often the pH will appear to be okay at different places in a larger tank, but the reality is something else.
The other thing, the pH probe might be placed close to the outflow of the reactor, thus not telling you if the pH is low elsewhere, sumps can have similar issues.
4 hours is simply too long, it should be 30-60 minutes or so.
Adding CO2 accurately to smaller tanks is much easier for this reason.
And that makes sense as well.
Regards,
Tom Barr
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Kan det stämma på din burk, brams?