Plant It BigFloat Auto Top-Up Kit Reduce the labour of regular tank filling and inspection by fitting a PLANT!T BigFloat Auto Top-Up Kit and secondary reservoir. The PLANT!T float automatically tops-up and maintains nutrient levels in your system reservoirs from a header tank of your choice. No pump is required as it works under gravity. Ideal for unattended growrooms and holiday periods. This professional top-up kit is one of the most robust on the market offering peace of mind that your plants are safe if your reservoir starts to run dry. All the necessary fittings are supplied in the PLANT!T BigFloat Auto Top-Up Kit, simply attach to the header tank of your choice