Too much K - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 04-14-2008, 01:18 PM Thread Starter
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Too much K

can too much K cause a problem?

i have a 40 gallon and 100 gallon without water change for over a month now, i'm giving additional K about 10 ppm every week beside the normal macro and micro dosing.


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post #2 of 10 (permalink) Old 04-14-2008, 03:59 PM
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Too much of anything could cause a problem at a certain extreme point. Having additional nutrients in our tanks won't cause algae, when we change the water every week to reduce their concentration.

Why not just water change and not worry about it?


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post #3 of 10 (permalink) Old 04-14-2008, 04:30 PM
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Are you in a situation where you are banned from doing water changes due to drought? Do you use additional CO2 for the tanks, or are they low-tech?

Also, do you use rest days for the tanks, where you don't dose anything and let the plants use up what is in tank already?
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post #4 of 10 (permalink) Old 04-15-2008, 01:45 AM Thread Starter
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i'm doing no water changes because i don't add CO2. i'm adding macro and micro ferts about 1/4 of the normal CO2 enriched tank.


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post #5 of 10 (permalink) Old 04-15-2008, 02:53 AM
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what are your lights? just keep it low, and you would even need to add ferts until needed.


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post #6 of 10 (permalink) Old 04-15-2008, 04:54 AM Thread Starter
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2 x 23 watts on 100x40x40 cm tank, hanged about 20 cm above the water surface.

lower than that my sagittaria and tenellus will die.

so i should stop the K addition because i don't do water changes right?


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post #7 of 10 (permalink) Old 04-15-2008, 05:40 AM
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Why would you add ferts to a non CO2 tank with good fish loads?

The rate is much too high, you only need about 10-20X the amounts you might for a CO2 enriched system.

So say your uptake is 8 ppm per week at high light/CO2: 8ppm/10= 1, maybe 2 ppm per week

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post #8 of 10 (permalink) Old 04-15-2008, 07:36 AM Thread Starter
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my fish load is 10 medium tiger barbs and 6 other small fish with daily feeding.

i added about 1/10 ferts needed in a CO2 tank about 2 months ago, but my plants show deficiencies. yellowing leaves and melting edges. that's why i increase the ferts to 1/4 now. im worried about the additional K2SO4 because i see something like rough white build up on plants leaves.

more K did this or the SO4?


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post #9 of 10 (permalink) Old 04-15-2008, 08:59 PM
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I agree with Eyebeat- why not do water changes if you're dosing ferts? It does sound like you may have a buildup of something in there... were you using CO2 before?





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post #10 of 10 (permalink) Old 04-16-2008, 01:12 AM Thread Starter
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i didn't use CO2 right from the start and i got bad algae problem espescially BBA when i do weekly water changes.

i do notice some mineral build up on some anubias leaves yet they're showing deficiencies.


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