new set up advice

[bobchick]

Hi, I've got a bunch of orchids that I keep in an old aquarium in pots set on those expanded clay pellets with some water in to keep the humidity but not let them sit in water, but id really like to display them better in more of an orchidarium type set up but I don't know how to go about it. how do you water/feed without it becoming swamped in water if you cant remove pots to water???? Really basic I know, but any advice help would be really helpful.
Thanks