Ok. I think I got a, hopefully, non-offendable, respectable question. Ya math geeks can double check my math.
according to Q&A-chap2 said:
12" koi = 370 grams average weight
16" koi = 890 grams average weight
lets say feeding 4% body weight.
lets say feeding koi with 1kg of 38~40% protein food has the koi producing 40 grams of pure ammonia.
Nitrosomonas and Nitrobacter, together, consume 7.14 mg of carbonates for every 1 mg of ammonia
If we want happy fish, then we would never let carbonate hardness fall below 80 mg/L.
Source:
Of course we must talk about hardness...
For a 12" koi, that is 14.8 grams food per day (that is 0.592 grams of ammonia per day), that is 4.23 grams ( 4,230 mg/L) of carbonite consumed in one day.
For a 16" koi, that is 35.6 grams food per day (that is 1.424 grams of ammonia per day), that is 10.17 grams (10,167 mg/L) of carbonite consumed in one day.
50 u.s. gallons of water (189.27 liters).
Carbonate hardness up to 120 mg/L. That is 22.714 grams (22,714 mg/L) of carbonite available.
Carbonate hardness up to 80 mg/L. That is 15.141 grams (15,141 mg/L) of carbonite to keep happy fish.
This means we have 7.573 grams (7,573 mg/L) available to be consumed if we want happy fish.
With one 12" koi in 50 gallons water of 120ppm KH, carbonate is depleted in less than 2 days.
With one 16" koi in 50 gallons water of 120ppm KH, carbonate is depleted in less than 18 hours.
according to Q&A-chap1 said:
We can then conclude that this system is doing the job that it was designed to do, of eliminating
nitrates as an end byproduct. We can also conclude that the heavy fish loads; of one Koi per 50-
gallons (189.2 Liters) of pond water, has very little effect on the capability of the Anoxic Filtration
System reduction capabilities.
Remember, in the AFS, some ammonia is directly consumed out of the water column. Ammonium is bound by the laterite and consumed by plants, if planted. Also, the faculative anaerobes will act like respiratory heterotrophs consuming the ammonium ion for their carbon energy source whenever nitrate is consumed. However...
according to Q&A-chap1 said:
In the Anoxic Filtration System, nitrifying bacteria will live wherever there is an ample
supply of dissolved oxygen. This will be on any surface in the pond, including the surfaces of all the
biocenosis-baskets; the side of the pond walls, the fish, and the plants stems themselves along with
under the leaves. The nitrifying bacteria also lives in the top half-inch to one and three-quarters inch
of the substrate of every basket, this also includes the sides and bottom. The denitrifying bacteria,
which consist of two different classes, will occur deep inside the substrate of each biocenosis-basket.
However, nitrifying bacteria will still be quite present in a layer of the substrate to consume some ammonia.
My two questions are ...
How much carbonate does AFS consume for every miligram of ammonia produced by the koi ??
When 1 koi per 50 gallons has very little affect on the capability of the filter, what carbonate hardness of water would you recommend maintaining ??