Water for birds

The small fountain on the left is the one the birds use when they want to drink or wash their feet.  They will even have a shower in this one.  Naturally they won't do it when you have a camera in your hand  but they do use it.  The small wall fountain on the right is the one they drink from because it is closer to the seed feeders above and to the left of this.  I am sure they would appreciate a bird bath too but there is a small creek close by and they don't really need a birdbath any closer.  The only thing I have noticed is that both fountains need to be cleaned fairly often to prevent the seeds they drop in from sprouting.  For that reason I clean them both once a week and only use clear water.  I am sure that a vinegar solution would work too but the clear water does fine.