Small systems work great on gravity; but, when you expand, you may need a pressuring pump system. These also help if you lose your pressure when mixing nutrients and additives in a reservoir. The pump pressurizes a pressure tank and turns off. The tank then silently supplies the water with the pump not running. These also can work to transfer water from a distant tank to one closer or to automatically fill a small reservoir with a float valve.
Pumps and Filters
Irritec USA 3" 155 Mesh Disk Filter XL
Description 3" 155 Mesh Disk FilterSize: 3" XLMesh: 155 Mesh Disks
$722.13
Irritec USA 3" 155 Mesh Disk Filter
Description3" 155 Mesh Disk FilterSize: 3"Mesh: 155 Mesh Disks
$618.95
Irritec USA 2" XL 155 Mesh Disk Filters
Description 2" XL 155 Mesh Disk Filters Size: 2" Mesh: 155 Mesh Disks
$656.36