Pygmy, to stand in water or not

[Simon]

As above, I got a few pygmy, stelliflora, puchella, paleace and another which I can't remember which species. The hobbyist I got them from does not stand them in the water, however after a week under my 4x39w T5 lights, the evaporation is simply too much and the soil is left almost dry at the end of the day.

So should I be placing them in a water tray? are they adaptable to very moist media?

TIA
Simon