100 Gal Black X-Trays Square ReservoirNo expense was spared when producing our high quality ABS plastic reservoirs; unlike the competitions styrene plastics. The reservoirs come with level markers on the internal side, facilitating the measuring of your nutrients. These reservoirs are extremely thick and withstand well to cold and shipping. The black plastic helps prevent the growth and spread of algae. Minimum Order Quantity on Freight Shipments for Reservoirs, Flood Tables and Water