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Tight schooling fish for unheated hard h20

1K views 9 replies 9 participants last post by  ngrubich 
#1 ·
Title says it all- I have some tiger and rosy barbs in a 75g, corys at the bottom. Water is unheated and off the charts hard. I have white clouds in another tanks already, and haven't had luck with tetras (prolly cause of the hardness?) so... danios? Do they shoal nicely? Open to suggestions!
 
#5 ·
Serpae tetras can survive 60˚F water and are bombproof when it comes to hardness.
 
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