Though I haven't grown it myself, Howeara Lava Burst 'Puanani' seems to not enjoy wet feet very much- if that's the case then I wouldn't use clay balls under the substrate, as it will wick the water back up into your orchid mix (presumably bark). You may want to try the egg crate method for this. I've gone both ways. and find that one has more control over the moistness of the substrate with the latter method.
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