1st lesson, 1965 on MN ranch,
1 gal. bowl doing well until we drove to KS for Xmas. Returned a week later, found dead fantail goldfish in middle of bowl. Hired man saved time, dumped all fish food at once.
2nd: 1978 Gladstone, ND.
20L, brown tap water from coal seam smell of petrol, UG filter...