02-01-2009, 05:42 PM
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I don't know much about the white film on the aristone, but I wouldn't reccommed you use your filter to chop up the bubbles. The high acidic content of the Co2 bubbles will cause excess wear and tear on your filter and can do some damage.
I have a DIY Co2 on my 3g planted. For a diffuser, I just used a bottle cap from one my my distilled gallon jugs and put a hole in the middle to insert the are tube for the air stone to go underneath the cap. I glued rocks on the outside and on the edge of the bottle cap to disguise it in the tank and weigh it down. Then, when the glue was dry, I put it in the tank and dug the diffuser as deep into the substrate as posssible, and even put rocks over it. I have had great success with this, as the Co2 bubbles are trapped inside of the tank for at least 10-15 minutes before they finally make their way up and out of the diifuser. My plants are doing well.
Does anyone know exactly how long the mixture in the bottle lasts before you have to make a whole new mix. I have read 10-15 days but I am not sure if this is a correct estimate.