Can anyone tell me more about micro-irrigation for hydroponic systems in tropical regions?

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We are trying to build a hydroponic system to produce Patchoi. We want to know how we can use water more efficiently in hydroponic systems.

Do you think micro-irrigation is the best solution for saving water in hydroponics? 

As we live in the Caribbean, our major problems are heat and finding the right suppliers for the hydroponic systems. If someone has experience in installing hydroponic systems, please share your experience. It would be helpful if you could suggest some suppliers in Caribbean for hydroponic nutrients as well.