On a side note, there's really not much wrong with bathing tails a lot. In the summer, it's like standard procedure to bath the tail after a hosing, especially if you show a lot and it's kept in a bag all braided up.
blah i dont bathe mine everyday i somtimes bathe them everyother day if i dont ride them in the summer but wen i ride in the summer i bathe them after
but in the winter i ride? i normaly get a washcloth and wipe away the dirt/sweet off
but i dont wash them everyday i think its waistful water and the horse will get dirty [like roll in the dirt]
but thats my opinion ;]