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R34dawn · 04-28-2008, 01:35 PM

For an example, if you have 30gal of water, with 400ppm of CA and due to your inhabitans
250ppm are depleted in one weeks time, so you do a water change of 20% the other 80%
remaining is 150ppm, there for if you are only adding 20% water @ 450ppm that 450 is divided in to 80% of the total water the remaining water will only have a value of 360ppm
more less depending on the CA level of your sw mix. To my opinion it is much easier to add
some calcium or Kalwasser that brings up your tanks dkh than to relay on water changes alone

04-28-2008, 01:35 PM	#14 (permalink)
R34dawn Torch Coral Join Date: Apr 2008 Location: Garden Creek,VA Posts: 1,172 Karma: 2723	For an example, if you have 30gal of water, with 400ppm of CA and due to your inhabitans 250ppm are depleted in one weeks time, so you do a water change of 20% the other 80% remaining is 150ppm, there for if you are only adding 20% water @ 450ppm that 450 is divided in to 80% of the total water the remaining water will only have a value of 360ppm more less depending on the CA level of your sw mix. To my opinion it is much easier to add some calcium or Kalwasser that brings up your tanks dkh than to relay on water changes alone _________ http://www.youtube.com/watch?v=QaqMLDxgwVU You can take the man out of the ocean, but you can't take the ocean out of the man!