I was planning to do a pond for my 14"-15" arowana, and I still am going to. However, thats being delayed and I don't think I'll get the chance for a few months. So I'm planning on upgrading to a 125 gallon sometime this week. The dimensions are 72"x18"x23". Personally, I think it's plenty big enough for a 14" arowana, but I just wanted to hear everyones opinions. Would the tank still be suitable by the time he is 18-19"? Again, I think it is fine, but I would like to hear everyones opinions.