Tom Barr said:So I guess with that modification, it's not the best in the business?
Haha, that's an old design I had, predates them by 6 years.
See the 2-3$ DIY version which looks better on the articel link here:
Took me 15 minutes and needs no sponge, and cost 15$ total with new powerhead or about 2-3$ without the cost of the powerhead added. You can make these any size(scaled up larger) or use more than one to suit larger tanks.
You can also use the venturi loop on external CO2 reactors to reduce gas lock and to prurge the gas that fills the tubes later in the lighting cycle.
No one else makes such a loop, probably because I've been the one designing them for many years Not other folks who see a design, try and copy it, charge 3X the cost. I just show the plans for folks to make it themselves.
Mine also works better.
Tom Barr said:I've got several external venturi designs running on a few folk's tanks now.
They are much happier with them, highly responsive.
I swear, I will post the photo's of the design on line here soon!!
Tom Barr said:The venturi has a line that comes off the tube of the reactor, I add mine about 1/3 to 1/2 way down from the top. A simple 3/16" hole is drilled, with a 1" piece of rigid air line is inserted, glued in place.
Connect this with silicone air line tubing to the canister spray bar right before it goes into the tank.
Tom Barr said:Drill another 3/16" hole and glue another piece of rigid air line in there, but make sure the tip inside the spray bar is smaller than the other end.
This will help produce smaller bubbles and tear the gas apart better.