Hi, everyone so my lfs has black arowana fry 2" for sale and I'm thinking about purchasing one. But I have a few questions that I just can't seem to find a straight answer to. What type of water parameters can they handle(ph and hardness)? I've kept a silver aro in my water conditions which are very hard and everything was just fine. But I've read when the black aro's are young they are more sensitive. How much more sensitive? where should I get my water at? And when they mature can they transition to harder water? I have always wanted one of these guys. I just want to do it right.