Hi I have a livewell that is come install on the boat. When i turn it on it braw water from the lake and fill up the tank the excess water goes out in a tube. The problem I have right now is that, if turn off the pump after the livewell is filled. the bait die fast. If i keep it on the bait is happy but since the tube is too slow for the water to get out. it overflow..... What can i do to solve this problem?