View Full Version : Water Change... Why?

02/22/2007, 03:16 AM
I have read in all my marine fish keeping books that the primary reason for a water change is for nitrate reduction.

I have also read on these boards, people saying it's not the only reason, and that water changes should be done frequently even if there is little nitrate build up in your tank.

Can anyone explain why?

Thanks in advance,


02/22/2007, 04:53 AM
New SW mix will replenish trace elements that get used up.

02/22/2007, 07:37 AM
AND new SW mix will dilute nasty things that build up which your filtration system cannot remove (like nitrates which you pointed out)

I have a third use :D :

I siphon dust and swoosh out the chaeto wad in the 5 gals I siphon out every week. This is a critical part of my aquarium maintenance routine. You know you did something as you pour out that funky bucket of water which isn't in your reef anymore

02/22/2007, 07:52 AM
Here's a good article on the pros and cons of water changes...
Water Changes in Reef Aquaria (http://reefkeeping.com/issues/2005-10/rhf/index.php)