Chromis not eating

[Michael Biando]

Im hoping to get some advice on this situation.
I have a reef Tank that has been running for six months, steady stats PH8.2 calcium 400
Temp 78 no ammonia ,no nitrates ,salinity at 1.026. I have had 4 chromis since the beginning. Now 2 stopped eating, it’s been 4days. No sign of disease, no new additions to the tank. Same Foods as always. I can’t figure out what is wrong. No sign of injury or anything. Could they be spawning? Do they stop eating when getting ready to spawn.
Any ideas or feedback would be greatly appreciated

 

[Scotty Buttons]

Have you seen white stringy poop? They could have a internal parasite. Seen any aggression between them? Small groups of chromis usually equals death to all but 1

 

[Michael Biando]

One of the ones not eating is the largest and most aggressive so nobody bothers him/her so I can’t figure out what is going wrong

 

[Michael Biando]

Have you seen white stringy poop? They could have a internal parasite. Seen any aggression between them? Small groups of chromis usually equals death to all but 1

Have you seen white stringy poop? They could have a internal parasite. Seen any aggression between them? Small groups of chromis usually equals death to all but 1

Have not seen stringy poop either

 

[dealseer]

Have you seen white stringy poop? They could have a internal parasite. Seen any aggression between them? Small groups of chromis usually equals death to all but 1

People say this, but I’ve had schools of chromis for years in multiple tanks

 

[Michael Biando]

People say this, but I’ve had schools of chromis for years in multiple tanks

Yes and I have not seen them fighting so I don’t know what’s up

 

[ngoodermuth]

Any head shaking/yawning, scratching, heavy breathing, etc?

 

[Michael Biando]

Any head shaking/yawning, scratching, heavy breathing, etc?

No head shaking or yawning but breathing seems faster than the others