I have about half of my collection on a 4x4 flood and drain table. The good thing about this system is that the humidity is always higher then normal(kind of like the humidity trays), the bad things about this system, one plant has a problem, they all have a problem...bugs, virus etc. This week, it's spider mites, with a few scale thrown in for fun
...luckily no viruses, knock on wood. I might try a drip system next time, I've not decided yet, but will update you when I do.
Regards,
Melanie
forgot to mention, waters twice a day(floods) for 5 minutes.