Fert expert needed! - The Planted Tank Forum
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post #1 of 4 (permalink) Old 08-12-2012, 06:01 AM Thread Starter
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Fert expert needed!

I have 10 Seachem frourish tabs in my 12 gallon tank. Can I still dose liquid Seachem Flourish once a week or is that too much? Also i dose Seachem Iron twice a week.
Also thinking about using Seachem Excel. I have shrimp, snails and fish and don't want to kill them with the ferts i am using.
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post #2 of 4 (permalink) Old 08-12-2012, 01:33 PM
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It depends on how much plants and how strong your lights are.

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post #3 of 4 (permalink) Old 08-12-2012, 05:46 PM
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Ya you can still dose those because the tabs are for the substrate and the liquids are for the water column. Just don't overdose...
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post #4 of 4 (permalink) Old 08-12-2012, 05:59 PM
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Look at the active ingredients in each product.

Plants use over a dozen different elements to grow.
Some are already supplied, so we do not have to add them.
Others should be supplied to keep the plants growing well.

Most tablets for the substrate are slow release, so whatever they provide is provided in small amounts over a long time. This is good, you do not have to dose (add tablets) very often.

Most water column products are short lived. They get used by the plants or microorganisms in the tank pretty fast, and some types of substrate can remove them from the water. Water column dosing needs to be done more frequently.

Here is the tricky part:
Fertilizers in the tablets can find their way into the water column. If you are also adding some of the same fertilizer via daily dosing that might become an over dose.
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