I'm pretty sure I've got this covered but like hearing different ideas so here it goes.... We built our house 15 years ago and have relied on a preexisting spring for all of our water needs ever since. As the family grew we went to a front load washer and offset the demand but now we added another and am sick of all the silt (shallow spring) so we're starting over. The old one is a 575 gallon above ground concrete tank whereas the new one will be a 1150 gallon burried plastic tank with a submersible pump on a 40/60 switch. I hit 3 springs digging our basement and fortunately took the time to develop them so there's lots of great water dumping over the hill plus 2 more springs to tie into... long story short I live on an oasis. Questions are what's a good method of pre cleaning the water? If I only use the springs from the basement which are deep and filter through gravel I'm not concerned but can't see wasting the others. My thought was to burry a plastic 55 gallon drum ahead of the tank, plumb a pipe from the bottom of the drum to just shy of the top to feed the cistern with the overflowing water then the incoming water from the springs would feed in halfway up the drum which would be filled with no smaller than 57 gravel creating a place for silt to settle??? I would also add a flush out drain to periodically flush it out. Any ideas on any aspect of this project are welcome. Tank is ordered and I'm going full throttle this Wed until it's done.