This is the perfect rubby-dubby tube, just use 4 inch waste pipe cut to about 2 foot, place a end cap on one end and a screw type cap on the other then drill half inch diameter holes all over, then place a rope through the top holes on the screw cap end at tie off the back of your boat. you can also use some weight in the bottom of it to keep it vertical in a strong current.

rubby-dubby consists of about 6 mackerel diced up small mixed with some fish oil and some bran flakes or similar and fill your rubby -dubby tube with it.