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Old 09-16-2014, 06:46 PM   #21
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Water Changes

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Originally Posted by Gregcoyote View Post
IMO it is based on system volume and livestock load.

Smaller systems it is more economical to use water exchanges, larger systems it is more economical to dose and use methods of nutrient export. Testing is critical if you operate this way. But even in large systems, folks like Mr X still like water exchanges as it is always the simplest way to go. I do minimal water exchanges, but I have a whole room dedicated to nutrient export.


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Couldn't agree more. 25% weekly water changes on a 300g system can get costly. It's better to invest is some nutrient export systems and dosing pumps as they'll eventually pay themselves off with the money saved from water and salt costs.

Then again, depending on whatever system you're running you can always do both. Similar to what I believe Greg here is doing, the occasional water change is always beneficial.

Personally, I like the water change route but if I ever go large, I'll definitely invest in the proper equipment to get a self sustaining ecosystem.
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Old 09-16-2014, 07:21 PM   #22
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Water Changes

I am running 500 gallons for the past 22 years. Water exchange is once a month 5% is changed. BUT as I said, I'm running dual protein skimmers, a ATS, Phosgard reactor, kalkwasser reactor and dosing pumps.


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Old 09-22-2014, 10:34 PM   #23
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I do 15 gallon water changes every two weeks to a month. Sometimes because I want to vaccum, sometimes because I want to know that my calcium levels are fine without testing. I use Kent reef salt.
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