Help need! All my rays stopped eating

  • We are currently upgrading MFK. thanks! -neo
Piece of good news:

The rays appetide are pretty much back to normal. I manage to get a kilo of the normal grey prawns for them, before this I was feeding them with those yellowish prawn which has a very strong smell. And guess what they finish almost half a kg of it! Really very relieve..

However, I've some puzzling thoughts. All along my rays were on the grey mp diet, with filet and mussle at times. However the week b4 I wasn't able to get my hand on those grey prawns and settled with those yellowish mp ( which has a stronger smell). However they accepted the yellowish mp immediately till the introduction of the new male ray and all of them completely stopped eating even when i try filet and mussle..
What could have happen? Could it be bcos i've spoilt them?? Stress from new ray?
 
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