using a floating pva bag under a float

Tried this a few times.Attached the grounbaited bag to the float,it floated until it melted.It dropped the groundbait right over the hook and float.
Seemed to work well for tench.
Used it on the canal at earlestown newton le willows.
There's new float out that has a cage feeder attached that does the same thing (Totally awesome fishing on utube)