I have been losing water only when the pump is running yet none of the plumbing appears to be leaking. Since today was a little warmer I decided to do some poking around. There was a wet spot in back of the upper bog.
It seems that the folds in the liner can act as tubing so that when the water is being pumped from the bottom of the bog, it finds the tubular folds in the liner an easier flow path than through the rocks rocks. The water comes up inside the fold and flows over the back edge which is a good 2 inches higher than the front edge. I guess the wicking and siphon action allow the water to “stick” to the liner and flow up and over.
To remedy the situation I cleared the rocks around the folds a little so more water could escape inside the bog and put a rock into the fold so it widen the tube and would hopefully slow the upward progression and limit wicking/siphoning.
