Do you still have to dechlorinate distilled water and is it any better than tap water??? If I have a 10 gallon tank what % of the water must I change???
Distilled water is basically JUST H2O since it's collecting the steam from boiling water and condense it back to a liquid.
Distilled water is ... IMO ... fairly useless as it lacks any dissolved nutrients / minerals vital for life functions of some aquatic life. That's my most times, it mixed with treated tap water, or you add minerals / nutrients to it.
Unless your tap's just got outrageous contaminants, just get a quality de-chlorinator like Seachem Prime.
why not just buy a RO/DI unit? I tried distilled water from the store and I still had TDS. Which to me says there is still stuff in the water I don't want. When I use my RO/DI unit I always have 0 TDS coming out.