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Topic Review (Newest First)
10-15-2012 07:50 PM
mechtec [QUOTE=Hoppy;2044164]Yes, I agree with that. The problem would be that the big bubble of CO2 didn't get dissolved into the water so the efficiency of the reactor would suffer. My external reactor, vertical, also built up a big bubble at the top, and it worked fine for me, but I knew it could be more efficient if the bubble didn't build up.

Maybe i didn't explain it enough, At the point that the bubble is large enough to come with in the path of the water, the main stuck bubble stays in place,, but new c02 bubble have no choice but to follow along with the water movement, The suck bubble if you will acts like a wall stopping more bubble from collecting. Making it like we didn't have a stuck problem at all, after all we are talking about a very tiny part of the reactor. So the rest of the reactor is behaving as planned? If the c02 was not dissolving into the water, then i would see bubbles coming out of the reactor, because c02 can't stay in the reactor forever, it must come out.... Looking at the discharge clear flex hose I can see very very tiny bubbles and as it dumps into the return section of the sump i can't see any bubbles at all. I am still waiting for my drop checker to come in. I am very curious as to how c02 we have in the tank. Right now we our doing about 3 bubbles a sec, I hope that is enough? The fish don't seem stressed out.

gary
10-15-2012 07:03 PM
Hoppy
Quote:
Originally Posted by mechtec View Post
ok if the co2 bubbles collect at the input end, they would continue to build up and grow to the point that they would interfere with the water flow, and at that point begin to travel along with the water flow? So one could have a build up of bubbles, but only to a point. just trying to think this out in a logical way?

gary
Yes, I agree with that. The problem would be that the big bubble of CO2 didn't get dissolved into the water so the efficiency of the reactor would suffer. My external reactor, vertical, also built up a big bubble at the top, and it worked fine for me, but I knew it could be more efficient if the bubble didn't build up.

Breaking bread, I also enjoy working with the equipment as much as the rest of the hobby too. (I would say I enjoy it more, but I know I'm supposed to enjoy the plants and fish the most.)
10-15-2012 02:40 PM
mechtec
Quote:
Originally Posted by Hoppy View Post
Unless the water velocity is pretty high, bubbles do float up. That is why if the wrong end of that horizontal reactor is higher than the other end, bubbles will collect at that end, out of the high velocity flow. If you introduce the CO2 as micro-bubbles, then they will never manage to float up, but will just follow the flow. But I didn't see anything in this one that would produce micro-bubbles.
ok if the co2 bubbles collect at the input end, they would continue to build up and grow to the point that they would interfere with the water flow, and at that point begin to travel along with the water flow? So one could have a build up of bubbles, but only to a point. just trying to think this out in a logical way?

gary
10-15-2012 07:53 AM
BreakingBread
Quote:
Originally Posted by OverStocked View Post
I can't phathom a reason to build one this big. Other than to say so. I have made pretty big units and never an issue or efficiency problem.
There is no claim being made that this is more efficient, the only reason why its long is because the reactor is being ran horizontal instead of vertical. Plus i had to buy the 4" pvc at a minimal length, so i cut one foot off it and built it to fit behind the stand. We enjoy the equipment aspect of the hobby just as much as the stuff inside the tank
10-15-2012 07:01 AM
OverStocked I can't phathom a reason to build one this big. Other than to say so. I have made pretty big units and never an issue or efficiency problem.
10-15-2012 06:34 AM
BreakingBread the reactor is loaded with bioballs and at the end of the reactor where the entrance to the 1" pvc is, its has biobale. I am hoping that this will help break up some of the bubbles. I havent seen big bubbles come out or the reactor yet which would tell me there is co2 build up, but ill keep monitoring it.
10-15-2012 05:52 AM
Hoppy Unless the water velocity is pretty high, bubbles do float up. That is why if the wrong end of that horizontal reactor is higher than the other end, bubbles will collect at that end, out of the high velocity flow. If you introduce the CO2 as micro-bubbles, then they will never manage to float up, but will just follow the flow. But I didn't see anything in this one that would produce micro-bubbles.
10-15-2012 04:28 AM
BreakingBread Bubbles dont understand up or down, they just follow the water current, and the longer underwater the better saturation. i wanted the reactor to go horizontal to maximize the saturation time without having excessive head loss on our main pump. I have been monitoring the waterflow through that part of the system and there hasnt been any sudden gurgling either from co2 pockets in reactor. It seems to be working great.
10-15-2012 03:30 AM
mechtec
Quote:
Originally Posted by Kathyy View Post
I thought reactors were supposed to stand up?

not necessary, either way the flow of water/c02 still has to travel the length of the reactor then back through the center smaller pipe, by then it should be well mixed. It should have a slight incline to keeps c02 bubble going in the right direction. if it don't work out like planned, that would be awesome to stand it up!

gary
10-15-2012 02:55 AM
Kathyy I thought reactors were supposed to stand up?
10-15-2012 02:05 AM
BreakingBread Theres a small ridge that prevents the pipe from going all the way through, i simply cut the ridge with a razor blade then sanded it down with sandpaper untill i could slip the 1" pvc all the way through.
10-15-2012 01:27 AM
GraphicGr8s How did you get the 4"-1" reducer to accept pipe on the inside?
10-14-2012 06:06 PM
mechtec
Quote:
Originally Posted by Kathyy View Post
That is awesome! No bubbles are going to get in your tank! Where is it going to be placed?

http://flexpvc.com/cart/agora.cgi?ca...-Tees-Reducing Bet there is one on this page!
We placed it behind the tank, secured it to the 2x6 header. Don't mind the paint job on the back glass, we left the area where the overflows unpainted, to be able to see in this area.







gary
10-14-2012 12:03 PM
BreakingBread The co2 travels through about 14-16 feet of reactor,uv sterilizer, and 1 3/8 hosing to return in sump, I was initially worried that we wouldn't have enough pump to power everything. Fortunately I had to tune it down almost halfway through that part of the system. Ill put some pics of it all later today.
10-14-2012 07:22 AM
boxhead1990 Thats huge!

Sent from my ST25a
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