New 120 gallon tank

Mar 17, 2018
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Hi people. New to the forum. Greetings from South Africa.

I had a 60 gallon tank with 10 malawis. All was good.
Upgraded to a 120g tank this weekend. Introduced the 10 malawis plus 3 new ones. The new guys are huge. Around 3 inches. Its 2 days now and none of them will eat. Slightly worried. Any advice will be appreciated.
Added a little bit of the old tank water to the new tank when setting up.
My parameters are all good. Nitrites, ammonia at 0. Ph at around 8. Temperature at 28 degrees.

Help please