My 30 gallon tank

Is this the same 30 gallon tank last week where all the fish died?
From this thread:
https://forums.saltwaterfish.com/t/396050/my-fish-died-need-help
If it is, I'd take things slow, and take some of the advice offered. I've learned a lot of useful information from posters on this board over the past year.
 
yes. it was over a week ago, and the guy at the store said it was fine to add new things. He said the water looked better than his. So my dad wanted to get fish.
 
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