How to get the ink out your aquarium?

[sepiola]

I think the title is clear :rollface:

 

[MJI]

Good skimmer, carbon, and if need be water changes

 

[sepiola]

Is it possible that the cuttlefish get poisoned by their own ink in the water?

 

[MJI]

Not in the strictest sense no, althought ink toxicity research continues.

The main effect is one on asphyxiation, or suffocation. The ink can cover gill coats and starve animals of oxygen.