How low without killing good critters

[David S]

Hi all

My kole tang,sailfin and birdnose has white spot back after around six weeks which looked to be clear,I have no way to remove the fish(have tried)and would like to know how low I can drop salinity to rid the tank of ich without harming any crabs,snails,live rock and other good critters???

I also have 2 pairs of clowns,one breeding pair which haven't been affected at all!!!

 

[ccCapt]

You must drop it to 1.009 to kill ich and no invert can handle that. Higher than 1.009 and the ich won't die.

 

[David S]

Ok,I'll have to try something else then,I cant remove all my rock or catch the fish.My lfs has a new trial coming in this week which he said I can try on there behalf.