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Old 11-14-2014, 09:16 PM   #71 (permalink)
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Default Re: Automatic water change system design DIY

If you have space for a water reservoir or if you have one (ie. you use RO water) you could always use a dual peristaltic pump. They are industrial and robust, designed to remove and add water simultaneously.

http://www.lockewell.com/index.php?m...roducts_id=160

Just add a timer and you have an automatic water changing system.
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Old 11-15-2014, 05:52 AM   #72 (permalink)
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Default Re: Automatic water change system design DIY

I leave the system from a friend, which I like for the simple
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Old 11-16-2014, 08:33 AM   #73 (permalink)
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Default Re: Automatic water change system design DIY

Quote:
Originally Posted by Raul-7 View Post
If you have space for a water reservoir
For example another tank under the display tank, like a refugium or, just a large rubbermaid/tank with the pre-determined amount of water pre-treated?

After researching peristaltic pumps why don't we (aquarium keepers) all use these for water changes on a regular basis? This system although it can be rather expensive seems like an ALMOST fool-proof way to conduct water changes. I've seen kits on amazon where the pump unit itself is only about $10!! What is the catch here? And the dosing units for reef systems seem to be a big thing... why don't we freshwater keepers have these!?!?! I mean the double unit on the link up above is $300 so I understand why not a lot of people have them but, seriously..

Last edited by HDBenson; 11-16-2014 at 02:20 PM..
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Old 11-17-2014, 04:26 PM   #74 (permalink)
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Default Re: Automatic water change system design DIY

Quote:
Originally Posted by HDBenson View Post
For example another tank under the display tank, like a refugium or, just a large rubbermaid/tank with the pre-determined amount of water pre-treated?

After researching peristaltic pumps why don't we (aquarium keepers) all use these for water changes on a regular basis? This system although it can be rather expensive seems like an ALMOST fool-proof way to conduct water changes. I've seen kits on amazon where the pump unit itself is only about $10!! What is the catch here? And the dosing units for reef systems seem to be a big thing... why don't we freshwater keepers have these!?!?! I mean the double unit on the link up above is $300 so I understand why not a lot of people have them but, seriously..
Exactly, any vessel that holds water will work. Essentially it has 2 rollers off the same pump - so it adds and removes water simultaneously. Meaning no guessing, etc. and unlike other peristaltic pumps it requires no calibration once you determine how much it removes initially.

The one I linked above is industrial, so it's proven - regular dosers have a limited lifespan and aren't designed to remove large volumes of liquid.

People on ReefCenral having been using the same pump with great success for 5 years or more.
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Old 11-18-2014, 08:46 PM   #75 (permalink)
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Default Re: Automatic water change system design DIY

That system will not work for me. Because one of the many reasons I like to do water changes is to remove the sediment from the bottom of the tanks with a very mild suction action. I use 5/16 " tubing with a gravity feed to remove the water and it works great. Then I simply pump the water from my RO container back into the tanks using a 250 gph pump. With 21 tanks going now and more on the way I can still do a 20 % water change in under an hour usually.
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