Hydro Flow Vinyl Tubing Clear 3/8 in ID x 1/2 in OD 100 ft Reservoir is slightly elevated for

Reservoir is slightly elevated for water temperature control

They feature the same thickness and design as their white trays

The ID trays maintain Botanicare's standard inside dimensions for maximum growth space and are composed of durable white ABS plastic

a spike in voltage may occur when the power is reinstated

Mini-Blocks sit in a tray (flat) without support for easy starting of seeds and cuttings

Hydro Flow Vinyl Tubing Clear 3/8 in ID x 1/2 in OD 100 ft Reservoir is slightly elevated forPremium vinyl tubing made of excellent quality. Made in the USA. Ideal for air movement from an air pump to air stones, air discs, Aqua Lung, Water Winds, etc.