Just finished putting liner in quarter acre pond obout 8 deep I wanted a pond bad enough that I didn't follow all the rules have influx of water under the liner what I can't do because of location and money put a French drain in, can not dig a hole with a sump can not put in a vent etc. The liner is 30 mill rpe my most likely option at this time is a hydrostatic vent in the liner that would let the bottom water into the pond. I know that it's not really recommended but was wandering what brand might work and how you put one in on an already installed liner. The po d presently has about 10 inches of water tks for any ideas