Seashawgal
I reckon the more you take them out the better they will get, in saying that they really need to dose up on Kwells before the boat hits the water, couple hours before even though the packet says 1/2 hour. No good taking them once on the water, or already sick, they will only chuck em back up. Best remedy I have seen after your out on the water is get them off the boat & into the water, depending on grey suits of course. Best of luck
Cheers