Water Testing Kit

[anewbie]

Hi all,

OK, I'm going to tell you that you have more fixed nitrogen then you have measured. Why (and how) can I say this? It is because the plants can't <"lie"> and

tells me that fixed nitrogen isn't the <"limiting nutrient"> for plant growth.

cheers Darrel

Yes but i wonder what the source of the nitrogen is; the light in this tank is not that bright (one of those cheap $50 lights @ 50%); of course the distance to the light is quite short. Anyway i'm not disagreeing but there is a bit of lack of undestanding to me - perhaps the fertlizer is stronger than i think it is and contain more than i think it contains.

 

[dw1305]

Hi all,

Yes but i wonder what the source of the nitrogen is

I can't help with that bit.

perhaps the fertlizer is stronger than i think it is and contain more than i think it contains.

Which fertiliser is it?

cheers Darrel

 

[anewbie]

Hi all,

I can't help with that bit.

Which fertiliser is it?

cheers Darrel

https://amazon.com/gp/product/B002DVVF0S/?tag=exoticpetnetw-20

There is of course another explantion - my total lack of understanding of scale of things - While my aquariums are currently under 5ppm nitrate; there was a time when 40 was acceptable; what i mean is that maybe at levels of 0.5ppm or 1ppm is all plants (like frogbit) require. We never really discuss what level is actually require only that sufficient is available.

 

[dw1305]

Hi all,

https://amazon.com/gp/product/B002DVVF0S/?tag=exoticpetnetw-20

Not that then, it doesn't contain any fixed nitrogen.

I'd just use <"Solufeed 2:1:4 and Solufeed Sodium Free TEC or Solufeed Coir TEC Combination"> mix. This is what I do, but with the <"Duckweed Index">, rather than adding a set amount weekly.

The difference between <"aquarium"> and commercial horticultural fertilisers is that horticultural fertilisers have to work.

In horticulture no one can get away with selling the <"World's most expensive water"> etc. If fertilisers didn't work, or weren't cost effective? No-one would buy them and the company making them would have gone out business. It is as simple as that.

and is only a "fertiliser" in the loosest of terms.

While my aquariums are currently under 5ppm nitrate; there was a time when 40 was acceptable; what i mean is that maybe at levels of 0.5ppm or 1ppm is all plants (like frogbit) require. We never really discuss what level is actually require only that sufficient is available.

I'll be honest I don't know the actual numbers.

At some point I will attempt to quantify that (using the <"Solufeed combination"> above) and either urea (CO(NH2)2) or ammonium nitrate (NH4NO3) as my added nitrogen source. Years ago I did something similar with <"hydroponically grown Radish"> (Raphanus sativus "Scarlet Globe").

cheers Darrel