best liquid fertilize? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 06-07-2014, 05:52 AM Thread Starter
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best liquid fertilize?

what is the best set up for liquid fertilizers ?
this is in a med light 55 gallon with out co2
my ammonia nitrate and nitrite are all 0
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post #2 of 4 (permalink) Old 06-07-2014, 05:54 AM
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best liquid fertilize?

The best liquid fertilizers are the ones you make yourself. The stuff you get from the LFS is mostly water with a sprinkling of fertilizers. I would suggest that you buy some dry fertilizers and then look up Zorfox's thread on how to make liquid fertilizers.
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post #3 of 4 (permalink) Old 06-07-2014, 08:21 PM
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I would start with the EI method. Dry ferts are the suggested material, but you can do it with liquids, if you want to buy it that way.

Seachem has a pretty extensive product line, with each element individually bottled so you can customize the dose per your tanks' needs. The labeling is both simple (add this much fert to this size tank) and complex. If you know how much you want to raise the nitrate level for example, you can use the complex information to customize the dose from the nitrogen bottle.
Seachem also has a dosing schedule at their web site, but I have not used it.

Once you have figured out how your tank responds, probably halfway through the bottles, you can think about getting the dry ferts to make your own blends.

At first the plants will be good with pretty much any dose, since they have been getting very little. Whatever the fish food supplies. So adding a little more of everything is good.
But when the plants get going, that 'little bit' will get used up, perhaps unevenly, and you will need to adjust the amount you are feeding them.

How to figure out what your tank needs:

Fish food supplies many elements, but perhaps not in great enough supply for the plants.
Fish food is low in Fe, K and Ca.

Tap water might be supplying the Ca. If the GH test is staying stable, and is at least 3 German degrees of hardness (around 60 ppm) then you can assume there is enough Ca.

Since you are testing the NO3 and seeing that the plants are using it all, I would buy these:
Trace (Comprehensive)
Excel (Carbon)

and work out a schedule where you dose N, P, K and Excel on one day, and Trace, Fe and Excel on the other day.
If you dose something every day, with a water change once a week, then you would split one week supply into 3 days.
ie: M, W, F dose N, P, K, C
Tu, Th, Sa dose Traces, Fe, C
Su water change.
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post #4 of 4 (permalink) Old 07-16-2014, 10:01 PM
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Very helpful, thank you! You have a way of giving concise, helpful data!
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