[APD] Re: High water evaporation in a planted aquarium

[Billinet at aol_com]

Hi, Mark,

I think that one of the main reasons that large and frequent water changes 
are recommended for planted tanks is that they offset dosing errors of nutrients 
that are added by those who maintain high energy tanks.  

Low energy tanks don't present that problem, so the need for water change is 
less.  Diane Walstad at one point mentions that a change every six months is 
adequate under some circumstances.  You might check out her book.

One problem that the heavy evaporation will cause is a gradual buildup of 
minerals in your tank.  The water leaves, the solids remain.   Eventually this 
will cause problems.  Perhaps you can reduce that by covering all or part of 
your tank?

Good luck!

Bill
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