I know. We think that the water department is artificially changing just
the pH to preserve the pipeline, or something.

They do that. However, when they do, the pH change is generally temporary.
Try measuring your pH after the water has sat in a cup overnight. Or after 15
minutes of vigorous aeration. The pH right out of the tap isn't necessarily
your real pH. Your real pH may be higher or lower.

does alkaline water hurt the swords?

No. They prefer hard, alkaline water.

I wouldn't bother trying to change your pH. Both your plants and your fish
will adapt.



Leigh

http://www.fortunecity.com/lavender/halloween/881/