No 1 is something I have done, no 2 would be miles better but I dont know if it would work?
The noise in Vid was when the CO2 was injected before the venturi, when injected CO2 and the recirculated CO2 use the same port on the venturi it isnt an issue at lower flow rates and just use the needle valve on the Vidao CO2 reactor to regulate the recirculation of CO2, seems to work well. I am getting a CO2 pocket build up about 100mm, so have ordered another venturi and will have twin venturi/reactors and try cross over feeds.Me says that venturi of yours is simply overkill/overpowered for the intended purpose. That venturi is for mixing fertilizer in an irrigation system. You would need to either use that venturi to simply take care of the CO2 accumulation at a certain depth OR use a weaker venturi to reduce the noise.
That would be difficult with that reactor he has because the top of the reactor is recessed compared to where the water arrives and so there will always be a pool of CO2 at the top. I think he would need to mod the top for all that CO2 to properly be mixed.If you could achieve that vortex cyclone effect it might solve that build up
Exactly my concern as well. In fact if I was Zeus I would have done a reactor with a jumbo 20 inch water filter instead of 2 reactors which will reduce flow with all the piping and fittings etc.my main concerns are about the amount of flow restriction the Venturi is causing
When full 500litres, at the moment about 350litres. I was able to drop 1.4pH with full tank with APS AF2 and twin CO2 injection with PLC controlling CO2 timingsHow many liters is your tank again?
Excellent work Zeus, keep up the good work and experimenting.
With that comes noise as well - but would work well if in different roomIf you could achieve that vortex cyclone effect it might solve that build up
my main concerns are about the amount of flow restriction the Venturi is causing, I wonder if a 25mm version might be worth trying ?
Had thought of that also , trying to keep parts/cost down also so more can use same system. PLC's are great for controlling fish tank but very costly@Zeus. Also something you might want to consider is to have the CO2 reactor in a separate loop from the filter by using a small pump. If I had the space that's what I would. Most plant growers I know have it set it up this way as it allow better control and also preserves your filter flow.
My opinion is this will not work unless you have quite some pressure buildup in the reactor. Reason being that with this fitting you will also have an inverse water pressure coming out of the smaller barbed connector. That is why I created a homemade "ventri". This greatly reduces the water pressure coming out from the smaller fitting and acts as a weak venturi.As I posted earlier in this thread, could you not use a straight pipe fitting rather than the venturi? As @foxfish mentioned previously, the water pressure should be sufficient to force the excess gas back up into the inlet tubing, and it may eliminate some of the issues with the venturi?
Yeap, same here. I am not seing the need for a venturi anymore after my new reactor design. @Zeus. I think I initially implanted the idea of a venturi in your mind like in Inception, come back to reality 😂I have tweaked mine so the tank gets enough CO2 without a build up
Still in testing phase m8 , if a few of us independently, try the same idea, even without controls and not in a scientific way and come to the same conclusion then it adds weight to our findings