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IFC Aquarium Fertilizer Calculator

Hanuman

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As I have a single 60cm tank, roughly 100 litres
Not sure of the dimensions of your tank but the standard dimensions of a 60cm are 60x30x36cm, which is 64L raw not counting the glass thickness.

so I'm using the spreadsheet for that purpose rather than to calculate how to DIY.
Yes with only 1 tank it wouldn't make sense financially to do DIY other than being a nerd like me and knowing it is costing more than just buying a pre-made product, OR, because you want a specific mix that no other fert out there provides.

IFC Fert Calculator includes APT Complete but not APT EI
Indeed and that is on purpose: the manufacturer purposely omitted Mg for APT EI on the label. Secret recipe so it seems. How I know? I asked Dennis. In fact APT EI is in the calculator already but we have hidden it as it wouldn't make sense to show a partially complete product.

I wont get into the details of the calculations you did (@Zeus. will probably answer the calculation part as he loves numbers, more than I do) as this would be nik-picking between APT Complete and APT EI (rebranded as APT 3 and APT e respectively BTW). Now, how to put this, the question you should be asking yourself is why you are choosing one fert over the other. Cost here is not really the factor as they are both the same price, granted not the same price per ppm of compound. APT Complete is a nitrate limited fert so are you looking for redder plants? If not then it would make sense to move to APT EI, otherwise stay with APT Complete.

Note that APT EI dosing quantities is different from APT Complete so with APT EI it's 14ml/100L/week if dosed daily, or 15ml/100L/week if dosed 3x a week. That's the recommended manufacturer dosing.

The Calculator also has a CostDetails sheet where you can see the price details and cost per major compound (Po4, K, Mg and Fe).

Note: I have actually been using APT complete for nearly a year now as I was carrying out some tests on that product. The only problem I see with that fert is it is low in phosphate and this has had the consequence of promoting GSA. I countered that by increasing the dosage to x1.5. GSA is now nearly completely gone.
 
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Zeus.

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I noticed that the IFC Fert Calculator includes APT Complete but not APT EI
We have added APT EI , however due to not being able to find the [Mg] of the product we was unable to do a clone so it is inactive. @Hanuman even contacted D Wong to try and get the [Mg], his answer was very polite however no [Mg] was revealed. We have the issue with many ferts that the data analysis of the product is unavailable to the public.
If a fert isn't on the calculator there one of two reasons
1. unaware of fert or not been asked
2. No/incomplete data analysis or total weekly yields for recommended dose.

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I could live with the cost of dosing 3ml of APT EI a day.

Yes with a tank of 100 liters or less the cost of using a commercial fert isn't great so I would normally advise using them - plus D Wong does some very nice scapes. For cost I would advise TNC in the UK or TSN if your happy dosing ammonium salts, if in the US or you can get it Thrive doses provide a great valve for money fert.
Getting the right fert is only a small part of the equation, common sense observe you plants and just dose a bit more fert, if after inducing a defiency for leave colour change then you need to be a bit more selective in you fert or go DIY

Hani posted whilst doing post ;)
 

erwin123

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Thanks for the guidance. My tank is 60x45x45 but effectively 60x45x40 (108 litres) because I have 10 years worth of plant soil in the tank reducing the effective height of the water.

From the APT website APT Complete and APT EI have the same amount of Magensium per 5ml dose, so my calculations my also have to be redone (thats why I 100% appreciate the efforts in creating the spreadsheet so I don't have to do the maths myself! :))

The question I was trying to answer was if I am on APT Complete, if I switch to APT EI which costs the same, do I end up using less of it (i.e. it ends up being cheaper)? From the extract below, the answer seems to be a qualified yes?


1625479042580.png
 

Wookii

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Both are quite low on Mg, so you may want to supplement with some Epsom salts unless you know you have some Mg in your tap water.
 

Zeus.

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From the APT website APT Complete and APT EI
Thanks for posting that, ther must of been an update which we both missed :thumbup:

When D Wongs gives use the Nitrogen is he talking [N] or [NO3] we decide to always use [NO3] although the calculator does quote both in the later details, folk use what they are familiar/happy with.
However you get x3+ NO3 for every N , so I will assume Dennis is talking N as it says Nitrogen - plenty of NO3 then
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The question I was trying to answer was if I am on APT Complete, if I switch to APT EI which costs the same, do I end up using less of it (i.e. it ends up being cheaper)? From the extract below, the answer seems to be a qualified yes?
Yes I agree, or dose the same and plants have a greater abundance.

We will update the APT range on next release/update ;)
 

Hanuman

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The question I was trying to answer was if I am on APT Complete, if I switch to APT EI which costs the same, do I end up using less of it (i.e. it ends up being cheaper)? From the extract below, the answer seems to be a qualified yes?
Yes and I answered that question partially before. The recommended dosages are:
  • APT EI it's 14ml/100L/week if dosed daily, or 15ml/100L/week if dosed 3x a week.
  • APT Complete it's 21/100ml/week if dosed daily, or 20ml/100L/week if dosed 4x a week.
So you can see that you need less APT EI.

As for the FAQs of 2HRs aquarium, I just contacted Dennis. He said that they have added the Mg ppm value recently because customers though the product did not contain any Mg. On next release I will activate APT Complete in the calculator since now we have that information but this might take a while since I am quite busy at the moment.
 
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Hanuman

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Both are quite low on Mg, so you may want to supplement with some Epsom salts unless you know you have some Mg in your tap water.
It is highly possible that if one is using tap water it will already contain enough Mg. However if using RO, indeed you might need to supplement the water with additional Mg. That's exactly what I do by using Magnesium Sulphate Heptahydrate (MgSO4·7H2O), or as you mentioned and more commonly known as Epson salt. Between 3-10ppm should do the trick.
 

erwin123

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Yes and I answered that question partially before. The recommended dosages are:
  • APT EI it's 14ml/100L/week if dosed daily, or 15ml/100L/week if dosed 3x a week.
  • APT Complete it's 21/100ml/week if dosed daily, or 20ml/100L/week if dosed 4x a week.
So you can see that you need less APT EI.

As for the FAQs of 2HRs aquarium, I just contacted Dennis. He said that they have added the Mg ppm value recently because customers though the product did not contain any Mg. On next release I will activate APT Complete in the calculator since now we have that information but this might take a while since I am quite busy at the moment.

Thanks for the advice and answers. When my bottle of APT Complete is finished I'll be switching to APT EI because it 'costs less' the same 'but has more'.

I'm currently dosing my 100 litre tank 6ml of APT Complete and 2ml of APT Zero daily.
 

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