not sure, a few grams maybe.
How do you figure the weights? Remember that it is not all about filter ability. A lot of other things come into it. For example, with this filter and your calculations you would be able to have 2 oscars in there. Logically, however, that wont fly, on the other hand if you put 3kgs worth of tetra in there it would prob be ok. It comes down to the nature of the fish, tetra are very clean fish. Things like bristenose on the other hand produce an epic amount of waste.
Bristlenose males are territorial, and they do fight, sometimes to the death. they also do not breed when their tank size is too small. They also produce a lot of waste. My grow out tank will go through a large cucumber a night, which means a lot of waste. I run a 2200l/h canister on this 200ltr tank, plus a sponge filter or few. Based on several of those calculators i should be able to house a lot more fish in there than I do but the nature of bristlenose does not allow for it.
I recommend 50-60ltrs minimum for breeding tanks (approx 1.5 square feet of tank bottom) with each tank housing either a pair or trio. That will leave ~25-45ltrs for your babies, and considering that each spawn can have well over 60 babies once they get into the swing of it, you will quickly run out of room or filtration ability.
It is a really nice tank, and the filter system is amazing. It really is! but the amount of poo these things make is also amazing
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