For fish i'm selling, they're generally in 1 gallon or smaller jars. I have to do a complete change. and if the fish won't cooperate to be cupped, i resort to the net. If the container's big enough you just have to be fast and it shouldn't harm the fish any. otherwise you can pour it out into a net, but it helps to have a bucket or something under that for a jumpy fish.
But for the other fish, it's a rare occasion for me to have to empty them 100%, so i vacuum around them, stick my hand (clean but not soap cleaned) in to sponge the glass if need be (you would be surprised how much that entertains the fish) and refill without removing the occupant(s) from the tank.
But for the other fish, it's a rare occasion for me to have to empty them 100%, so i vacuum around them, stick my hand (clean but not soap cleaned) in to sponge the glass if need be (you would be surprised how much that entertains the fish) and refill without removing the occupant(s) from the tank.
