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Reverse Osmosis / RO Systems and Usage Talk Talk about the use of Reverse Osmosis in the Koi pond. Ask your questions here.

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Old 27-03-2012, 09:45 AM   #11 (permalink)
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Hi Dave,

I forgot to stamp his passport lol, As said, the other pond runs slightly lower KH/GH and tds, but over the years I have let the KH drop to just over 1 which brought the pH to 7.2 ish and then just managed it at that.

Plan is to get the KH down to 1, and see where the pH settles at, I may buffer the KH until the GH has been driven out and then start a mix of RO and source water to get it where I want it.

It may be that when the pond mellows and finds it's own balance I may not need the RO, only time will tell.
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Old 27-03-2012, 12:35 PM   #12 (permalink)
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Sorry Dave, the readings of 3.5 KH and 6.5 GH are the pond...
the supply is 6 KH and 12 GH TDS 240 (just recalibrated the meter)

pond TDS now at 210, KH/GH as above.
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Old 27-03-2012, 04:12 PM   #13 (permalink)
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Hi Al,

You supply water is good so it will be easier to run yours a little harder where i have to be a bit careful as i can trash membranes if i run it to hard.

As long as you keep the waste output below 900-1000 its much better thats why i think you will be OK. One thing i would do if i was you would be to add a auto flush system (speak to Alan) to flush out the system regularly as i have found that works a treat and has made a big difference to me on my systems.

Good luck mate..................your need it now your playing with RO lol
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Old 27-03-2012, 05:04 PM   #14 (permalink)
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Hi Gazza,
I have left it at 650 tds waste, that seems a happy medium. Autoflush fitted from day 1

Cheers
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Old 27-03-2012, 09:04 PM   #15 (permalink)
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Only issue I can see is that longer term the KH / GH ratio you have is such that you are probably gonna have to look at buffering rather than mixing.

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Old 29-03-2012, 04:39 PM   #16 (permalink)
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Thought as much, cheers Dave.
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Old 29-03-2012, 07:50 PM   #17 (permalink)
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Hi Al,

I buffer instead of mixing its easy and i don't leave the tap on and cock it up lol
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Old 29-03-2012, 11:17 PM   #18 (permalink)
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Cheers Gazza
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