Tap water is all I use... but I have amazing tap water.... just let it sit
and circulate for a day or two to get the Cl out.... 0 Cu, 0 P, Ca through
the roof.... but it is a from a CaCo4 spring that feeds the whole city, very
exceptional water. If your water isn't good anything you put in your tank is
very hard if not impossible to get out completely. And it will build. Every
you add more water you add a little more, say P, which will not be removed
without water changes or removing of macro algae. SO while I do it I do not
recommend it for most... check your water. Most come from a lake, which is
horrid.

Tre' Landrum


"Martin" wrote in message
...
Does anybody have any comment on using a small proportion of tap water to
make up my tank, due to the size of containers I can get and the distance
to travel the initial set up of my tank would be easier if I could about
5-
10% tapwater.