PHP said:I'm not understanding your question....
What is a "blagdon pa 2"
You can easily oxygenate a pond with a simple to advanced water feature and/or pond plants.
Bige said:How big a pond? If you have a waterfall this will do the job.
Unicorrs said:In my opinion, diffused aeration is the best way if you have deep ponds because the air diffuser is on the bottom and you can achieve total pond aeration from the bottom to the top regardless of depth.