water change causes cloudy water and residue (fish distress)

Plants need need the minetrals and traces, so do fish. I doubt many people
are scuessfull with pure D/O, not without adding electrolytes. I doubt food
would do the trick.

Too low a kH and gH in a planted tank would mean trouble, a pH crash most
likely,not very health fish.

I think you will find that people who use DO/DI water are mixing with hard
water to meet the needs of soft water loving fish.

The original question was about cloudiness. An ammonia spike caused by
treating only the clhorine in chloramine water will do it.
see below. Google Sodium thiosulfate + chloramine


OR
http://www.csd.net/~cgadd/aqua/art_chlorine.htm

Use a product that handles both or your fish suffer.

Bob

"Robert Flory" wrote in message
...
|
| Depends on the fish. Most need more electrolites/minerals than
pure R/O
| water would have.
|

I don't believe this is significant enough to be concerned about. I,
and thousands of other fishkeepers around the world, use nothing but
RO\DI water, and are quite pleased with the results.

billy