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Re: [APD] CO2 and trickle filters

  Here is a very simple idea.
  Seal the wet/dry tower, if no CO2/O2 can exchange from the outside, then it will not degas.
  O2 comes into the the section and is consumed by bacteria NH4=> NO2=> NO3.
  These bacteria need a fair amount of O2, There's plenty in the water.
  If you want to get rid of excess CO2, then an air vent helps, if not, then seal the vents.
  Otherwise the CO2/O2 get dissolved into the water.
  Several folks added CO2 to thr wet/dry chamber, It acts like a giant CO2 reactor when SEALED. If not, it'll degas.The bacteria make up for the losses, it does not matter if you remove the bioballs, you'll have more bacteria if you leave them in. 
  I'm not sure why so many have issues with that.
  The over flow is straight forward also. Adjust to about 2-4" drop.
  Adding a tad more CO2 is not an issue either.
  Tom Barr

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