DIY Coil Denitrator Questions

I have been looking at different DIY plan for Coil Denitrators and I was
wondering if anyone has had any luck building one of these things. I am
really curious what kind of pump and flow rate did you use. Can anyone make
any recomendations or give me specific directions on how to build one? Any
information will be apprecitated.

From what I have heard you should get a some PVC pipe 3-4" diameter and run
75-100ft of 1/4in clear tubing around and fill the middle of the tube with
bio-balls. Then you should let the output drip at 1 drop/sec until the unit
has cycled then you can open it up to flow at full speed once the unit has
cycled. I have heard of cycle time between 6-8 weeks. Does this sound about
right? Thanks