Is there a trick to finding pvc condos once they are dropped. I put out 9 buckets with 8 or so 5ft peices of pvc last summer. Went back today with the gps ..had to crank the sensitivity up to 100 % on a Lowrance lms 339 and I'm still not for sure I'm on them...the GPS says yes..but i thought 9 buckets in a tight circle would have a stronger image. They are in 17ft of water on a flat..so I know they have not moved..How good does pvc show up..? This is the first time I've tried all pvc ..tree tops are my normal.