A general fertiliser, with or without nitrogen (N) and phosphorus (P)
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Old 02-07-2008, 09:27 PM   #1
50000tears
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A general fertiliser, with or without nitrogen (N) and phosphorus (P)


I have a 200 litre planted tank which will also in time be well stocked with fish. The set up is new but all my plants will be in once my bulbs arrive tomorrow.

I have been looking for a good general fertiliser to dose maybe weekly in my tank. I currently daily dose with excel and have about 1.4WPG of light. I also have a plant substrate and root tabs in.

Of the two fertilisers I have narrowed it down to, one has no nitrogen or phosphorus in it and one does. I understand that these are supplied naturally by plant waste so might not need them but should I get one with it in anyway? What extra benefit do I get from having it, or what problems can it cause my fish if using it when tank is well stocked with fish?

The two products are here and you will see that they are essentially the same apart form the (N) and (P)

http://www.aquaessentials.co.uk/inde...oducts_id=1035

http://www.aquaessentials.co.uk/inde...oducts_id=1037
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Old 02-07-2008, 11:14 PM   #2
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Adding it will not hurt, if you do large water changes weekly etc, then the tap may have enough NO3/PO4 anyway as well.

Adding some K+ will help also.

You can easily tailor the routine using
KNO3
KH2PO4
And K2SO4.

Each adds K, but one has NO3, one PO4 and the last just K+.
You can customize to suit your tank and tap water.

Regards,
Tom Barr
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Tom Barr
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Old 02-07-2008, 11:48 PM   #3
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Ive been using this once or twice a week with adequate results. The PMDD mpre-mix is easy to mix and I have been using 12 ml on my 29 gal. and 20 ml on my 55 gal. So far so good. Sorry, I don't know the exchange from gallon to liter off the top of my head.
http://www.aquariumfertilizer.com/Store.html
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Old 02-08-2008, 04:28 PM   #4
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If you don't want the "N" & "P" why don't you just add some Equilibrium by Seachem. It has a lot of "K" plus a lot of other trace or micro ferts.
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Old 02-08-2008, 04:32 PM   #5
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Quote:
Originally Posted by saint27 View Post
If you don't want the "N" & "P" why don't you just add some Equilibrium by Seachem. It has a lot of "K" plus a lot of other trace or micro ferts.
That's not completely correct.

Equilibrium does have a good bit of Potassium, but it's a "GH builder" also containing mostly Calcium, Magnesium, with a touch of Iron and Manganese. I wouldn't really refer to that as trace and micro ferts. Perhaps you meant Seachem Flourish for micros?
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Old 02-08-2008, 09:45 PM   #6
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Quote:
Originally Posted by plantbrain View Post
Adding it will not hurt, if you do large water changes weekly etc, then the tap may have enough NO3/PO4 anyway as well.

Adding some K+ will help also.

You can easily tailor the routine using
KNO3
KH2PO4
And K2SO4.

Each adds K, but one has NO3, one PO4 and the last just K+.
You can customize to suit your tank and tap water.

Regards,
Tom Barr
Tom your probably simple post has confused me utterly. I am a complete newbie when it comes to well planted tanks so you will need to treat me like a 2 year old I am afraid!

NO3 I know is Nitrate and PO4 Phosphate. How do I know how much to dose? Do I feed more or less PO4 if I start getting algae? Can I dose reasonable quantities of NO3 as long as I am sure that the plants are obsorbing it all and it is not polluting the water? Should I be aiming for an optimal level of NO3 in the tank most of the time?

As far as these go

KNO3
KH2PO4
And K2SO4

Will I need any of these if my water out of the tap is naturally hard. KH and GH are both 15-16 and PH 7.4 out of the tap but 7.8 in the aquarium.

Last edited by 50000tears; 02-09-2008 at 12:48 AM..
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