BTW: Putting wormers in water isnt a very effective way of worming birds. You dont know if a bird drank enough of the treated water to be effective or if they drank it at all. Sick birds rarely drink or dont drink at all. Direct dosing each bird one at a time is best. That way you know they got properly wormed, no guesswork about it.
Excellent point! A therapeutic dose is only a guess if mixed with water... Better to be sure and direct dose each bird.