urville

Indeed better growth, less algae, more or haha any pearling.

I can tell you to that the tank being 29 gallon and my hatred of flow pushing my plants over one another causing shade hehe ahem...
i'm not getting those bubbles around that tank as fast as i'd like. it could be better, and forgive me but i cant see how using the venturi will help this issue. in fact i feel i get better spread this way. its hard without real flow to get those bubbles to every inch of the tank. and from waht i have noticed theres always going to be at least one dead area bubble wise. I think once I go pressurized here within the next two weeks that will help greatly. I was thinking about using a T, and put two diffusions of co2 on each side of the rear. OR and this is the best idea but requires I do some major substrate disturbance... is to use the jet system form the DIY section at the cichlid-forum. This places several small jets around the tank substrate that blow upward using a powerhead located int he rear of the tank. If I use this as my diffuser and jet the bubbles from many areas of the tank from below the plants i think the result will be triple fold.

Still takes a good long time for pearling to begin, but then i am on DIY co2 and I'm having a light issue. i'm not quite hitting the upper envelope of 3 wpg.
still a couple of things to work on.
Ian

alexperez

I got my 2 small Azoo diffusers yesterday and hooked them up. I placed the diffusers in the path of the water flow. The tank started to get filled up with lots of micro bubbles pretty quick. In about an hours time the pearling had increased a lot. Now to see if growth is increased any.

plantbrain

Alex, you can use DO level differences as a measure for increased/decreased growth and compare those with dissolved CO2.

That is a good measure of plant production/growth.

You should be fairly pragmatic with it though........I'd suggest doing this several times and allow the plants to get use to the higher levels of cO2 for a few weeks and then go back and give it a few weeks at regular CO2 diffusion.

I have not done that....... but will.

The data I now have only points one direction, the CO2 in the reactor tube that builds up is CO2. I have 6 different methods and parameters to support the gas is CO2 and not O2(which I have and have added) as well as the persistence as CO2 levels go from ambient to 30ppm(roughly 10-60X normal CO2 levels).

I'm not sure why so many people believ that somethign will dissolve at the same rate when the concentration is nearly 50X higher...........
As the concentration gradient decreases, so does the solubility.

But more than that, the method does work on a basic non scientific practical level and folks can see the results. It's also a cheap method that can easily be added to an existing system as well as modifying the external and internal reactors to purge the CO2 gas bubble build up that occurs daily and improves reactor efficienies.

So try it and see and observe, then you can postulate and experiment.
CO2 is far more interesting and significant than many of these other nutrients and a good focus on making it non limiting will allow the plants to use the other nutrients much better and reduce algae.

Even if you use DIY, you will get the most out of the DIY this way.

Regards,
Tom Barr

www.BarrReport.com