OK this is going to be a stupid question but any advice as to how to put the water back in during a PWC. Getting the water out is nice and simple with a siphon into a bucket. But when it comes to filling back what should I be doing. I did try and balance the bucket on top of the tank and use the siphon but (a) this was pretty hard to balance the bucket and (b) it was pretty slow as little difference in height between the bucket and the tank. Just pouring the bucket in uproots plants and stirs up all sorts of stuff. Using a small jug avoids this but again takes ages. Any advice??