Using lechuza citrus pon as a substrate as I've heard that citrus doesn't take to LECA well. Wicking up nutrient solution from the reservoir which is being kept fresh by an air stone.

I moved it to this setup from soil because I'm bad about checking for soil moistness, and it lost most of its leaves. But I can refresh the water every week or two in a reservoir no problem.

This picture is a week old and since then there's been even more new leaf growth.