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-   -   Miracle gro fertilizer? (http://www.plantedtank.net/forums/showthread.php?t=229122)

pmcarbrey 01-29-2013 02:17 PM

Miracle gro fertilizer?
 
I was recently told that it is possible to use miracle gro to dose a planted tank, is this correct? I was told that it would not harm any of the fish and that it would be an easy alternative to ordering fertilizers to dose with :icon_ques

UDGags 01-29-2013 02:38 PM

Probably no

Most contain urea (listed on back as ammonical nitrogen sometimes), which breaks down into ammonia.

And a good portion contain heavy metals, which are toxic as well. Check the contents of the one you want to buy here

http://agr.wa.gov/PestFert/Fertilize...ct1.aspx?ltr=M

happi 01-29-2013 02:44 PM

urea is not the problem if ph is 7< but i think Miracle gro isn't balanced fertilizer for planted tanks.

pmcarbrey 01-29-2013 02:51 PM

Quote:

Originally Posted by happi (Post 2386402)
urea is not the problem if ph is 7< but i think Miracle gro isn't balanced fertilizer for planted tanks.

Ph out of the tap is 8.6, so no worries there, I'll go ahead and check the box I have lying around and see if it's any good!

UDGags 01-29-2013 03:04 PM

I'd personally be worried more about the heavy metals in most Miracle Gro if I had fish/inverts in the tank that are sensitive.

ronnie6989 01-29-2013 04:06 PM

I seen somebody use (miracle grow organic) up on the internet.....I WOULD NOT USE IT. You really got to watch what additives are in it and how it is going to affect ur ph.

Ronnie

steven p 01-29-2013 04:32 PM

I use gro-fine, a more balanced knock-off.

In.a.Box 01-29-2013 04:38 PM

I use the All purpose plant food no problem.
Just dose small amount at a time. My is run on a auto fert dose-er ^^

I know a guy who been using it for yrs with snail, shrimp, fish, plant etc.

pmcarbrey 01-29-2013 04:50 PM

Quote:

Originally Posted by In.a.Box (Post 2387298)
I use the All purpose plant food no problem.
Just dose small amount at a time. My is run on a auto fert dose-er ^^

I know a guy who been using it for yrs with snail, shrimp, fish, plant etc.

How much do you dose? The all purpose is what I have

happi 01-29-2013 05:04 PM

Quote:

Originally Posted by pmcarbrey (Post 2386498)
Ph out of the tap is 8.6, so no worries there, I'll go ahead and check the box I have lying around and see if it's any good!

i meant to say urea or ammonium based fert become problem if Ph is higher than 7. yours is already high enough to convert ammonium or urea into ammonia within seconds after adding to the water. i wouldn't suggest adding this fert in that parameter.

UDGags 01-29-2013 05:12 PM

Quote:

Originally Posted by pmcarbrey (Post 2387410)
How much do you dose? The all purpose is what I have

Which all purpose? like full name exact....

pmcarbrey 01-29-2013 05:13 PM

Quote:

Originally Posted by UDGags (Post 2387594)

Yep, that's it

happi 01-29-2013 05:16 PM

Quote:

Originally Posted by pmcarbrey (Post 2387602)
Yep, that's it

N and P looks ok but K+ is low, which can be added separated through K2SO4, but there are so many other metals at higher rate which might not be suitable for planted tank.

UDGags 01-29-2013 05:22 PM

Quote:

Originally Posted by pmcarbrey (Post 2387602)
Yep, that's it

The metals are so high...you better be careful.

I think 3% of the N is urea, which will be ammonia within seconds at your pH. Keep this in mind if you are going to dose with it.

Darkblade48 01-29-2013 08:38 PM

As people have already mentioned, I would highly recommend you not using any (terrestrial) fertilizer that uses ammonical nitrogen (urea) as its nitrogen source, since it will become ammonia in your aquarium (at a pH of 8.6, there will essentially be no ammonium anion formation).

There have been people that have successfully dosed with urea, but I do not think they ever dosed when there was livestock in the aquarium.


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