sea cucumber poisioning

Question
could you please help me  i think that it as poisoned our marine tank  two fish have died today and the rest look very lethargic and gasping at the bottom of the tank , we have done all the water tests and they are fine ,we are now doing a water change as well will this help or is there anything that we can do or add to the  water thanks

Answer
hi, have you sprayed anything near by your tank lately? air freshner, furniture polish?

all i can recomend is do your water changes and keep the water airated (have powerheads pointing at the surface of the water to disturb it, this helps get oxygen into the water)

would also be helpfull to tell me the results of your water tests