Dosing Flourish Comp. - Do I Need NPK? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 11-04-2012, 12:39 AM Thread Starter
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Dosing Flourish Comp. - Do I Need NPK?

Do I need to dose NPK? Tank specs:

Tank started April 18, 2012

10 gallon
Cover: Glass
Lighting: 2x 10w CFL in dome reflectors - medium light
Substrate: (sorry) medium-large gravel 1-1/2 inches deep
Filter: AquaClear 30 on minimum but no biological filtration
Ferts: Seachem Flourish Comprehensive: about 2.5 ml/30g (4 drops eyedropper) + 1/4 tsp Equilibrium (not a fert!)
Flora:
1 unidentified Sword
3 planted Water Sprite
a few Cabomba
1 Water Wisteria
12x Pygmy Chain Sword
Some Java Moss
3 unidentified rooted plants

Fauna:

7x Pristella Tetra
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post #2 of 6 (permalink) Old 11-04-2012, 01:02 AM
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With that much light your plants will probably do much better if you dose NPK, treating the Flourish Comprehensive as a trace element mixture only. But, you could use substrate fertilizing instead, probably equally as effective.

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post #3 of 6 (permalink) Old 11-04-2012, 12:27 PM Thread Starter
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Oh, I forgot those - I have most of a box of Seachem tabs in the tank. I started with the Sword, got the Pygmy Chain Swords, and I guess a few others - crypts I think. So I guess they have macros - all I knew was fertilizer for root feeders. Good call. Thank you.
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post #4 of 6 (permalink) Old 11-04-2012, 04:26 PM
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Check the label for ingredients, and when the tablets are used up.
Then plan to start dosing, or add more tablets.
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post #5 of 6 (permalink) Old 11-04-2012, 08:15 PM
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Seachem root tabs don't contain much in terms of macros.

Best thing is to observe your plants - are they looking healthy, green, and grow well? Or are the new leaves pale and don't grow to the size of the older ones? Are the old ones withering away as new ones appear? Algae wanting to take over?

If you are the curious kind - it is fairly easy to test for N and P. While not scientific precision, you can figure out if there is way too little or way too much.

A good source of information is your water report. Some areas have considerable amounts of NO3, others high levels of PO4 in their tap waters.


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post #6 of 6 (permalink) Old 11-05-2012, 11:06 PM
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I would add that temperature and plant selection are also critical to how much NPK plants will take up, otherwise without a certain balance you'll have an algea fest, or will be slowly toxifying your plants.
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