I use Hydras with the fan kits (all three fans) to condition my beads. The fans can be a little noisy but they work OK. The one catch is that the fans can only be a short distance away from the main unit (I think the limit is 12-18 inches). They are small fans, so that is why I use all three. You also need to attach (glue/tape) the fan's to something otherwise they will not stay put.
An alternative that requires a little more maintenance but might be easier to deal with (no cables) is a battery operated fan. I use these too. You can get an RV refrigerator fan like this one:
They are inexpensive (<$10) but you do have to change the batteries.
One final note -- I find that the RH adjustment on the Hydra sucks. They are not easy to adjust and any adjustment does not seem hold for very long. I plan to replace min Hydra's with something better one of these days.