RO/DI Ok for Betta ?

[Captainhemo]

Well, had the RO/DI here so figured if it was ok to use it...
Was hoping it would eleiminate any unwanted alge etc into the tank. I always here of so many fw folks having algae issues and alot of them seem to use tap water.
The point being, now that the tank insn't here in my place anymore, the cleaner it can stay the better as I don't see my sister doing a lot to take care of it