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Re: [APD] New notes on CO2 misting methods

The Kent venturis are designed for a very high flow rate
and reasonably good water pressure -- the kind of thing you
can get with some of the larger sump pumps but I wouldn't
expect it to work well with, e.g., Ehiems, where the
constriction of the venturi will present substanial "head"
to the pump.


--- Thomas Barr <tcbiii at yahoo_com> wrote:

> I've tried a new method for CO2 in the mist. No
> diffuser/Reactor at all.
> Fits on to the outflow of the canister filter outside the
> tank, cheaper than diffusers, maybe the same cost as very
> cheap diffuser/DIY reactor. Use a spray bar along the
> back lower side the entire length of the tank(or close).
> Add a Kent Marine venturi(or other brand etc) to the
> outflow from the canister. Add CO2 to this line in put.
> http://www.aquariumpros.com/p-KEN12VENT,SKac.html
> This produces a very fine mist along the entire back wall
> and can be directed through the plants very evenly for
> any sized tank. Other types of venturis are
> available(some cost a fair amount for better results such
> as the Mazzei).
> http://www.ultralifedirect.com/protein_skimmers.htm
>  It is key to use very good venturis or the larger bubble
> size will influence the results.
> But the trade off is more pump pressure and flow
> drop(always some trade off).
> These venturis can be mounted outside AFTER the canister
> filter(which solves several issues for many). It does
> reduce flow rates, but nothing is inside the tank.
> The venturi mist adds a curtain from the bottom up
> through the entire tank, no matter what shape/size it
> might be hitting the leaves from the lower side.
> A solenoid shuts the Gas off at night.
> These are typically used for Protein skimmers for Reef
> tanks.
> I use these for aeration instead of skimming my planted
> Marine tank(you do not get any skimmate from a planted
> marine FYI).
> Anyhoo,
> The venturi method might provide yet another option for
> even dispersal of CO2 mist since it can be connected to
> the spray bar right before going into the tank.
> The spray can be configured an infinite number of ways
> for ANY size tank to get even bubble distribution.
> My test tank is still going nuts(no water change now for
> 16 days). 
> The pearling was/is NOT a temporary effect.
> Consistently day after day, very high dissolved O2
> levels.
> I will do a water change tomorrow morning to see if I can
> produce the same effect and how it impacts the DO level.
> Next is hooking up the venturi and trying another method
> to do this in addition to these I've discussed.  
> Regards, 
> Tom Barr
> www.BarrReport.com
> ---------------------------------
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