Reliable Zigbee gate under VeraPlus?


my VeraPlus zigbee function is not working.

I need to measure a swimming pool water temperature and I cannot find a z-wave device to do this but found some zigbee. However, I need to add a zigbee gate under my VeraPlus, to see this temperature in my HomeWave apps (2 ipads on walls, 2 iphones)

Do you have any experience or recommendations on a reliable Zigbee gate I can use under VeraPlus (perhaps in some slave mode)?

Thank you!