Hi All,
I still in USA at the moment. I newly set up a tank for a friend here & bought fishes from Petco; For most kind of fishes, Petco offered a Care Sheet which tells something about that fish & general management matters. On that paper, it told gallon of water for inches of fish and also min. tank size;
I will say, no matter source from anywhere of xL water for ycm fish. That is a reference, NOT a standard. Nos of fishes you keep are all depands on sp. (refected the size), equipments & management.
Or, we may talk about a baseline. I think that's difficult to define all consideration into figures. Water quality can use figures to tell N's value. But how about the STRESS of fishes? It only can tell from our objective observation (from my own knowledge, may wrong).
By the way, here are something off topic to Utopia
" If not bet on marksix, 0% of chance to acheive the prize money"; Aim & proceed to earn better living may not success; Failed, review and reproceed may turn out right result someday.
