Manure should be well-composted before it is sold to people as an ingredient in potting soil. Doesn't matter whether the manure is originally from chickens, cows, or what-not.
If the soil is growing plants, I wouldn't worry about the smell. Maybe it is a stray worm that's decomposing at the bottom? And whatever it is, the smell probably will decrease as it eventually decomposes. I certainly wouldn't tear down a tank because of it. Just increase aeration and do a water change.
If it truly is manure, you should be able to confirm its presence by measuring ammonia.
You do know that nitrogen is a major plant nutrient? Your plants in Tank #3 may be nitrogen deficient, since the substrate has none and you haven't added fish/fishfood. Same goes for phosphate.
Thank you for constructive feedback. I have added both NH3 and KH2PO4 to the tank regularly in the water layer, but I think I will tear it down and make a dirt tank of it. Here is tank 3:
And here are some close ups:
So, I started to "wash" the forest soil yesterday that I collected this weekend.
and after some "wash" ...........
It contains a very "reddish" color and it is almost only gravel in different sizes left
. I have probably washed it too much.I do not think this "soil" contains much nutrition, but if I mix it with one of the commercial garden soils I should be fine perhaps?
Another question, while watching my other tanks yesterday evening, I saw release of bubbles from the bottom layer of the tank with tiger soil, without me poking in it. It seems like this tank have started to release bubbles by itself randomly. I did smell and there was no smell at all at the surface of the tank. Can it be the magic CO2 release from the soil, or is that too early and too naive to expect? And when should I expect the plants to start growing like crazy? I am into week 4 now, is there a particular time point when we should expect great plant grown (if the soil is what we hope it should be for a planted tank)? Is it after 4 weeks, after 8 weeks, or longer?
What I am trying to figure out is which soil I am going to put in tank 3. The soil which release a lot of bubbles or the tank with a faint smell of manure and less bubbles. The tiger soil vs the sowing soil. Ideally, I should just wait and see how the plant growth goes in these two tanks.
Organic content: >40%
Density: 440 kg/m³
pH-value: pH 5,5 - 6,5
Totalnitrogen (EN 13654-1 1500 mg/l)
: light peat moss (H2-H4), dark peat moss (H6-H8), sand, organic chicken manure
, limestone, kalimagnesia.
Aditions pr. m3:
Magnesium and limestone: 5,5 kg
Chicken manure: 2 kg
Kalimagnesia/patenkail (potassium sulfate and magnesium sulfate): 0,3 kg
Garden compost, Vermicompost, sand, chicken manure
For outdoor use, can contain worms, for plants in pots, to improve current soil, use nitrogen fertilizer after own choice.
Size: 0 - 10 mm
Density: 580 kg/m3
Nutrition in mg/L
Nitrogen (N) 3000
Natrium (Na) 46
Ammonium (NH4) 0,23
Nitrat (NO3) 13
Bor (B) 1,2
Fosfor (P) 4,2
Kobber (Cu) 1,7
Kalium (K) 1200
Jern (Fe) 87
Kalsium (Ca) 5300
Mangan (Mn) 3,7
Magnesium (Mg) 160
Sink (Zn) 15