I did a 20G water change after he did that and I'm running a bunch of carbon. It's annoying though, I'm just gonna start feeding him when he's not out and just walk away till he finds the fish or crab on his own. I know the ink isn't good for the system. Fortunately though, it does dissapate in around 300 or so gallons of water so hopefully it's not as bad but it needs to end the inking