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CO2 at 400 ppm

Hi Victor,
That looks better than I thought it might. It looks like flow is moving across the bottom towards the back, but what I don't like is the diffuser. That's just not a very good device at all. You would be better off porting the gas directly into the filter inlet or using some kind of inline device. Prune the plants, pull out the bottom halves and replant the tops.

Cheers,
 
ceg4048 said:
Hi Victor,
That looks better than I thought it might. It looks like flow is moving across the bottom towards the back, but what I don't like is the diffuser. That's just not a very good device at all. You would be better off porting the gas directly into the filter inlet or using some kind of inline device. Prune the plants, pull out the bottom halves and replant the tops.

Cheers,
Click to expand...
Alright! The diffuser is a JBL pro flora Taifun Reactor. There are 3 of them in my tank. It increases the contact time of CO2 bubbles with the water because it has a CO2 path in spiral. Each reactor that I have is roughly 25 cm tall. That means that each CO2 bubble will travel about 1,2 m in the water until it reaches the surface! These reactors are very efficients. Check the video below and you'll see that CO2 bubbles will become smaller as they approach of the reactor top. Even then, do you think a inline device will work better? I could to it 😉. Thank you again.

 
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As I mentioned, before you spend money, remove the devices and port the gas directly into the filter intake(s). Then check the pH profile and, most importantly, see if the plants respond.

Cheers,
 
ceg4048 said:
As I mentioned, before you spend money, remove the devices and port the gas directly into the filter intake(s). Then check the pH profile and, most importantly, see if the plants respond.

Cheers,
Click to expand...
Alright, I'll do it. I'll I also will buy some porous stones to put in the power heads pipes to help the CO2 diffusion. What do you think about? The stone is this one: http://produto.mercadolivre.com.br/...pequen-cermica-55-x-15cm-micro-bolhas-2pc-_JM it produces micro bubbles. Thank you.
 
Well to tell the truth Victor, I'm very confused as to your plumbing. Are you saying that the powerhead output is ported into a spraybar? I thought your spraybar was connected to the output of your filter. Your video did not focus on the plumbing so that's not clear at all. If the powerheads are not connected to the spraybar then there is no need for stones. If they are connected to a spraybar then it might help when the powerhead sucks the CO2 bubbles in. I just not understanding the setup at all. Maybe a sketch or a schematic might help to clarify, Sorry...

Cheers,
 
ceg4048 said:
Are you saying that the powerhead output is ported into a spraybar?
Click to expand...
Yes, there are 3 powerheads connected to a spraybar (the brown pipe). Look again the video, it's a few hidden but in some parts you can see the brown pipe at the top part of the tank. The 2 green spraybars is from the filters. Got it?
 
OK, well ideally the gas should be ported into the filter inlet, not into the powerheads, but this is very strange because it appears that the green spraybar is on very short compared to the gray spraybar - and it's mounted on the end.

I guess you'll have to try different combinations of porting gas into both the filters and the powerhead inlets. The money that you spent buying 3 of those loco ladders and 3 powerheads would have been better spent just buying a more powerful filter. There would be less junk inside the tank and better CO2 dissolution through the gray spraybar. You wouldn't even need the green piece.

Yes, this is all very strange, but I'm sure you did the best you could with what you had - and the flow does look OK in that video. As long as the water jets come out of the holes in a straight line towards the front glass then all is good, but I suspect that you might just be spitting out bubbles from the gray spraybar if you inject through the powerheads but it will be better than those ladders.

Cheers,
 
ceg4048 said:
OK, well ideally the gas should be ported into the filter inlet, not into the powerheads, but this is very strange because it appears that the green spraybar is on very short compared to the gray spraybar - and it's mounted on the end.
Click to expand...
Yes, the green spraybars is really very short. The are 2 in each corner of the tank. The flow is made mainly by the powerheads. I did a scheme here: https://imageshack.com/i/hjfWZcs7p .The blue crosses are the locals where I'll drill the pipe to put the CO2 hoses with the porous stones that will stay inside the gray pipe. There are two stoppers that separate the flow of each powerhead inside the spraybar. Forget about the CO2 ladder in the image, this is a old picture.
 
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Yeah, OK, I was too nervous to ask how you prevented the powerhead flows from interfering with each other but the stopper is a good idea. I realize you're getting rid of the ladders but just for future reference, you might have had better luck with them if you had ported their output into the pumps instead of just letting the gas escape out the top of the tank.:wacky:

Cheers,
 
ceg4048 said:
I realize you're getting rid of the ladders but just for future reference, you might have had better luck with them if you had ported their output into the pumps instead of just letting the gas escape out the top of the tank.
Click to expand...
Yes, I've thought about this but I was not able to do the powerheads suck the gas on the ladder top 🙁. But it doesn't matter now. I'll do the inline diffusion 😉
 
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