Hi all,
These work very well, what you have to bear in mind that these are designed for rooting and growing on terrestrial plants, and in these cases the plants roots aren't designed to deal with low oxygen environments, you can also feed your plant very efficiently from the spray. For plants that naturally grow submersed (including marginals, floating and emergents) they have morphological (aerenchyma etc) or physiological adaptations to deal with water logging, so aeroponics doesn't offer as much advantage over hydroponics as it would for tomatoes etc. That is why commercial aquarium plant growers can use rock-wool as their growing medium of choice, waterlogged rock wool is sub-optimal for terrestrial plants, but ideal for aquatic ones, and cheap to buy.
A thermostatically controlled heated propagator is well worth buying, but for aquatics you don't really need the aeroponics side of it, you can stand rock-wool blocks, or net pots of coir/peat/perlite/vermiculite/hydroleca clay granules etc in water + nutrient sol. in the base of the propagator and the plants will have wet roots (from capillary uptake) and 100% relative humidity at the leaf.
The other problem with terrestrial plants is that the roots grown in potting compost differ from the roots grown in water and you have a difficult weaning period when you place compost grown plant into hydroponic culture (and vice versa from water to soil).
cheers Darrel
