The tank is not venting properly.
A standard 40-lb propane tank stands 29.5-inches high. It is 12.2-inches wide. The cost of filling a tank of this size will vary depending on your location and the facility filling it.
Yes. Without a licence and training, filling a tank by yourself is dangerous.
Place the tank on the dock or shore to fill it.
You should not ever hear your tank filling unless you are using hot water somewhere. Your tank is under pressure always so it would never be filling if you were not using hot water.
Put the fish in 2 days after you get the tank, they live longer.
keep contact between the tank and fuel spout
keep contact between the tank and fuel spout
You simply pour in the measured amount anywhere as the tank is filling. It will mix in easily enough.
keep contact between the tank and fuel spout
Make sure the tank "vent" is not kinked or blocked.
keep contact between the tank and fuel spout