Flo-n-Gro Black 100 Gallon Reservoir Lid (2 Pieces) The Flo-n-Gro® reservoirs and lids are made from a premium ABS plastic. They feature a UV inhibitor that prevents them from breaking down when exposed to natural or artificial lighting. They are also resistant to cracking. The reservoirs feature a two piece lid which allows you to easily check your water level. They can be used as a water source for many different hydroponics syste... — LTL Shipping Required. — Ships from H: WA, CA, CO, MI, TN, PA, FL USA....more info.