Hi all, I have a question about greenhouse irrigation. I currently have a 180 foot well with submersible pump with Amtrol tank..prob about 25-30g tank This tank is about 10-12 years old and has never had air adjusted. I irrigate for up to 6 hours a day sometimes, regular garden hoses, about 200 feet long for my greenhouses. I'm confused about why I even need a pressurized tank. Since the sub pump isn't cycling, it just turns on and runs constant until I stop watering. Question: Is the Amtrol tank increasing my PSI at all? I have noticed a drop in pressure when watering and I believe that is do to the sub pump wearing out and or getting slowly clogged with rust over the years(lots of rust in my area).....or could this have something to do with the Amtrol tank? My pressure gauge is broken, but I believe after the tank is run down, the pressure gauge used to drop to zero....does that make sense? Any suggestions on a replacement tank if pressurized tank is not needed? I should add that most of the time, I'm watering off a booster pump being gravity fed from a 1500g storage tank. I have this storage tank filling from the sub pump to Amtrol tank. I also fill this tank over night and have noticed that it is taking longer and longer to fill this storage tank. Again, this would be a submersible pump issue and not the Amtrol tank...right?