Good responses yall..
Yes, im sure the actual pressurised systems are cheaper in the long run. But i think its the lower immediate costs of DIY methods that create that impulsive temptation and makes victims of us.
Im glad you asked that questin Oreo, regarding the carbonated water, because I too have pondered upon alternative physical ways of adding co2 to the aquarium more based around chemical reactions and the like. I mean surely theres better ways than having some obscure fungus respiring until its own toxic wastes lead to an ultimate demise in the system. At first this yeast method seemed awfully odd and primitive upon discovery however it really is quite effective for one main reason.
Most Chemical reactions only proceed to a certain stage in reality and of course last only until the reactants are consumed. Most known reactions for producing co2 would be quite rapid and be over quite rapidly at aquarium temperatures.
Boilogical reactions however, such as the respiration of our yeast freind, continue throughout the lifespan of the organism.
So yes, like everyone else was saying, it is this consistency found in the more natural methods that create that advatage over just physically adding it to the system.
However a very good question and i too was wondering this.
Glad to see peoples contributions and diffusion ideas, keep em coming
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