Thanks all 
Yes both of the silvers have DE in both eyes.
The two blacks are void of the DE affliction.
Any of them have DE?
Yes both of the silvers have DE in both eyes.
Any of them have DE?

Looks like its about time to upgrade the tank!!
Those silvers are massive, they make that tank look tiny. I know what to post next time that "can I keep a silver in a 180g" topic comes up again...