New start with my Arowana tank some questions

[davidw]

Originally Posted by Dave57

Interesting. First time I heard of this. Care to share why is ro/di heavily advised?

Yes, agreed. Fw arowana set up is much more simpler than big marine set ups.

the key lies in how confident the hobbyist of the tap water of possible contaminants... which could cause problems to marine organisms esp if it is a complex marine setup, thats y RO/DI water is preferred...