water change or no - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 09-14-2012, 09:39 PM Thread Starter
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water change or no

Allright everyone had this tank set up for 9 months now 75 gallon fx5 filter co2 electronic doser with reactor tank is doing very well full of plants it's been two weeks since a water change water is crystal clear plants are thriving, ammonia 0 nitrite 0 nitrate 15 do i really need to do water changes or is it best to just leave it alone? I am so on the fence about this I get so many different ideas from store owners and such.
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post #2 of 11 (permalink) Old 09-14-2012, 09:49 PM
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If a/n/n are reading zero, no immediate need if nitrate reach 20ppm, then a small one would help. What's the tds?


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post #3 of 11 (permalink) Old 09-14-2012, 09:54 PM Thread Starter
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Don't have a meter to measure TDS KH is 4 and GH is 6 does that help, never checked TDS
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post #4 of 11 (permalink) Old 09-14-2012, 10:02 PM
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Tds will tell how saturated the water column is and commonly used to test drinking Water. For example, If your tds is upwards of 200, its not considered drinkable.


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post #5 of 11 (permalink) Old 09-14-2012, 10:05 PM Thread Starter
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I will go out and get a meter, what should it be at in an aquarium with a bunch of community fish?
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post #6 of 11 (permalink) Old 09-14-2012, 10:15 PM
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I use a TDS meter to determine when to change water in my 30 gal shrimp tank. I've gone 6 months with only top offs before reaching 200 TDS which is my limit because of my livestock required parameters.

It's easier to change water tho, if that is not a pita for you...


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post #7 of 11 (permalink) Old 09-14-2012, 10:32 PM Thread Starter
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does anyone know what the required TDS perimeters are for a community tank? Also what would be a good meter to use.

Last edited by caique; 09-15-2012 at 05:52 PM. Reason: added some info
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post #8 of 11 (permalink) Old 09-20-2012, 03:08 AM Thread Starter
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Okay, I went out and bought a tds meter, tds in my tank is 159 so that bad or good?
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post #9 of 11 (permalink) Old 09-20-2012, 03:22 AM
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159 is a good value for soft water fish.
Indicates there should be enough minerals for them (and the plants) without the water being too hard.

For hard water fish that would be really low.
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post #10 of 11 (permalink) Old 09-20-2012, 01:13 PM
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Using a TDS meter as indication of water quality.
I use 100% RO water and remineralize rather than mixing with tap due to source issues.
After a large water change of 50 to 80% I set my base parameters.
Setting GH, KH and dosing trace, 10ppm NO3, 2ppm PO4 I'll wait 24hrs for the water to mix and stabilize then test TDS.

When TDS values rise about 100ppm above the 'clean' recorded test I do another water change and restart things.

On my NPT (soil based tanks) it's basically the same thing, TDS either stays close to the fresh 'clean' water recorded level or water changes are done when levels rise to remove organic build up.

HTH


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post #11 of 11 (permalink) Old 09-20-2012, 03:02 PM
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Quote:
Originally Posted by wkndracer View Post
Using a TDS meter as indication of water quality.
I use 100% RO water and remineralize rather than mixing with tap due to source issues.
After a large water change of 50 to 80% I set my base parameters.
Setting GH, KH and dosing trace, 10ppm NO3, 2ppm PO4 I'll wait 24hrs for the water to mix and stabilize then test TDS.

When TDS values rise about 100ppm above the 'clean' recorded test I do another water change and restart things.

On my NPT (soil based tanks) it's basically the same thing, TDS either stays close to the fresh 'clean' water recorded level or water changes are done when levels rise to remove organic build up.

HTH
Same here.


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