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Terrestrial plant fertiliser

fabihanski

Member
Joined
22 Jan 2021
Messages
27
Location
southampton
At risk of sounding like a noob, other than being toxic for fish, why do we not use terrestrial fertiliser - on aquarium plants?

I completely appreciate that if a fertiliser isn't designed with aqua fauna in mind, it will kill them. I have been out of the hobby for 8 odd years now and just coming back, I'm quite enjoying just growing aquatic and semi aquatic plants in various ways, My Fluval fluorescent lights burst and killed everything, which is why I'm hesitant on live stock for the time being. I can't seem to see anything bad in my go to fertiliser for house plants and outdoor plants.

Would it really be bad to use something like this extremely watered down with no livestock in a spray bottle twice weekly? As and when I choose to have fish and shrimp, I would plant to wean the plants to something like tropica over the course of a few months

(very sorry if this upsets some people, not my intention!)

For reference, the fertiliser is Miracle Grow for ericaceous plants (Plants that dislike hard water and alkaline water)
Screenshot 2021-02-08 at 9.47.34 pm.png
 

ceg4048

Expert/Global Moderator
UKAPS Team
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11 Jul 2007
Messages
9,182
Location
Chicago, USA
Would it really be bad to use something like this extremely watered down with no livestock in a spray bottle twice weekly? As and when I choose to have fish and shrimp, I would plant to wean the plants to something like tropica over the course of a few months
There are in fact some commercial aquarium fertilizers that do exactly this. Of course they are watered down significantly to the point of which they sometimes are not economical.

On the other hand, the home grown mixes popular with the EI dosing scheme, work well, are non-toxic and are cheaper even than miracle grow, without the risk of ammonia poisoning.

Cheers,
 

dw1305

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7 Apr 2008
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nr Bath
Hi all,
On the other hand, the home grown mixes popular with the EI dosing scheme, work well, are non-toxic and are cheaper even than miracle grow, without the risk of ammonia poisoning.
I'd agree about dangers of using <"mixes with ammonia in them">, but "Miracle Gro" is incredibly cheap.

If any-one is interested in the ingredients they are:
Ingredients: Total Nitrogen (N) (24%) (Ammoniacal Nitrogen (3.5%), Urea Nitrogen (20.5%), Available Phosphate (P2O5) (8%), Soluble Potash (K2O) (16%), Boron (B) (0.02%), Copper (Cu) (0.07%), Water Soluble Copper (Cu) (0.07%), Iron (Fe) (0.15%), Chelated Iron (Fe) (0.15%), Magnesium (Mn) (0.05%), Chelated Manganese (Mn) (0.05%), Molybdenum (Mo) (0.0005%), Zinc (Zn) (0.06%), Water Soluble Zinc (Zn) (0.06%).

Derived from Ammonium Sulfate, Potassium Phosphate, Potassium Chloride, Urea, Urea Phosphate, Boric Acid, Copper Sulfate, Iron EDTA, Manganese EDTA, Sodium Molybdate, and Zinc Sulfate

I actually bought 1200g <"for £4 last time>, because it was a "larger pack, same price" promotion (still available at that price).

@Zeus. and @jaypeecee have been experimenting with using <"urea ((CO(NH2)2)) as their nitrogen source">.

cheers Darrel
 

Zeus.

Fertz Calc Meister
Joined
1 Oct 2016
Messages
3,850
Location
Yorkshire,UK
If any-one is interested in the ingredients they are:

I actually bought 1200g <"for £4 last time>, because it was a "larger pack, same price" promotion (still available at that price).

Inputted the figures into the IFC Calculator (figures need to be triple checked yet) however
1612869969579.png


For a 1g/100l which cost £0.003
 

Oldguy

Member
Joined
27 Aug 2018
Messages
399
Location
Gloucestershire, UK
I used to use Phostrogen about 25 years ago. Then researched hydroponics but difficult to fault EI with dry salts. eBay has changed a lot of things and chemicals are much easier to buy than they were even 15 years ago.

If you want to dose ammonia, increase your fish stock, they come with built in dose meters and are nice to look at.
 

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