Does venturi orientation matter?
- Thread starter Slickdonkey
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DonW
R.I.P.
It needs to be on the output otherwise ozone would go into the tank. Venturis have a minimum flow rate before they start pulling air. Ive got about 400 gph going through the same set-up but with 1/2" tubing. Yours should work fine providing you have the needed flow and of course the venturi is installed correctly. I think the direction question was already taken care of.
Don
Slickdonkey
Drink me
It's a good amount, probably 100-200 gph or so. Seems to be working ok now that I put the check valve on. I worry about it failing though.
DonW
R.I.P.
I just checked it. At 200 gph you get 2" vac, at 400 you get 18" vac, at 600 you get close to 20. I'd say 400 would be as low as I would go with that venturi.
Don
Slickdonkey
Drink me
Ok I'll give that a shot. I'll have to measure, but I think 400 gph may overflow the carbon container that's catching the effluent.
DonW
R.I.P.
Slickdonkey
Drink me
You mean a different venturi or shrink down the inlet with some reduced tubing or something?
DonW
R.I.P.
Slickdonkey
Drink me
Ok. Since I already have 100' of 3/4" tubing I'll just have to use bushings to reduce down and back up again around the venturi. Shouldn't be a problem, I don't think...?
LakeEd
Achilles
Brian,
I also toyed with doing the coil Ozone reactor that Randy mentioned in that article. Try as I would, at the slow flow rate I wasn't able to get any venturi I tried to work satisfactorily either... so I'm going to continue following along here to see how and what your solution is.
I also toyed with doing the coil Ozone reactor that Randy mentioned in that article. Try as I would, at the slow flow rate I wasn't able to get any venturi I tried to work satisfactorily either... so I'm going to continue following along here to see how and what your solution is.
Slickdonkey
Drink me
Well it seems to be working ok over the last 24 hours, but it is a little touchy.
- Too fast and it will overflow my carbon container. I have to get the flow rate just right, and use an air pump to force air into the venturi.
- If the flow is too slow, no air/ozone mix gets in.
- I had to use a check valve on the airline tubing or else water can shoot right up into the ozonizer.
- I had to ditch the air dryer. Too much back pressure causes the cap to blow off.
I took the approach of cranking the rheostat on the ozonizer way down, so the it's is on for longer periods of time instead of coming on and off many times each day and shooting the ORP up quickly. Eventually the goal is to be able to gradually tune it so the ozone is on almost 24 hrs/day and keeps the ORP at a steady level. I figure this is safer in the off-chance my controller or probe fails.
LakeEd
Achilles
Have you noticed a "lightening" of your skimmate output from your skimmer?
Since I didn't end up with the Coil Ozone Chamber, I am doing the "standard" method of inputting the Ozone into my system via my Skimmer. Before Ozone... I was getting a very dark skimmate in my collection. Now, its a much lighter color. The amount is about the same as before, just a lighter color. Of course, still smells like a toilet... darn it anyways! hehehe
Since I didn't end up with the Coil Ozone Chamber, I am doing the "standard" method of inputting the Ozone into my system via my Skimmer. Before Ozone... I was getting a very dark skimmate in my collection. Now, its a much lighter color. The amount is about the same as before, just a lighter color. Of course, still smells like a toilet... darn it anyways! hehehe
Skimmy
SKIM FU
that always happens when you inject ozone into a skimmer, perfectly normal
LakeEd
Achilles
I knew that was normal... just wondering if when Brian uses his Ozone Reactor, vice injecting the ozone directly into his skimmer... if he still is seeing the same thing?
My best guess is... he is. My reasoning behind this is that the Ozone is breaking apart the parts of our water that retain some color... and weather we inject directly into the skimmer, or elsewhere... since the entire water column is affected, will still see same results.
Just wanted to verify my guess.
My best guess is... he is. My reasoning behind this is that the Ozone is breaking apart the parts of our water that retain some color... and weather we inject directly into the skimmer, or elsewhere... since the entire water column is affected, will still see same results.
Just wanted to verify my guess.
Slickdonkey
Drink me
Actually when I had the ozone going directly into the skimmer venturi, I was not getting much skimmate at all. My bioload is still low at the moment, but even so if I turned the ozone off for a few days it would start collecting nasty dark stuff.
At the moment, now that the ozone is being injected separately from the skimmer, the skimmate does seem to be a lighter color as you say, and I'm getting a lot more of it than I was with the ozone going directly into the skimmer.
At the moment, now that the ozone is being injected separately from the skimmer, the skimmate does seem to be a lighter color as you say, and I'm getting a lot more of it than I was with the ozone going directly into the skimmer.
Slickdonkey
Drink me
I ordered a smaller (1/2") venturi today. We'll see if that allows me get better suction at lower flow rates.
LakeEd
Achilles
Thanks for the info there Brian! I was kinda expecting it to be of a lighter color skimmate. I am probably getting the same amount of skimmate even though I inject the Ozone directly into my skimmer... because I tend to skim very wet. One of the advantages of using an empty IO salt bucket as my collection cup!
I was kinda expecting it to be of a lighter color skimmate. I am probably getting the same amount of skimmate even though I inject the Ozone directly into my skimmer... because I tend to skim very wet. One of the advantages of using an empty IO salt bucket as my collection cup! 
