In your very first post in this thread, you wrote.....
2. the diameter of the stand pipe. I have used 1/2"PVC and 3/4" pVC. Each diameter will drain the bed faster that it is being filled.
Was this 'with' the media in the grow bed...?
Now your saying....
Try testing 'with' the media in the bed.Originally Posted by flienlow
If you then have too much in-flow, you can split the line comming form the pump...and send it elsewhere.