kuhli’s in a 10 gallon tank? u might be able to get one in there kuhlis can reach 4 inches long! i have a kuhli and 5 of our fav fish along with an SAE and 4 tetras in a 20, it really depends on the level of oxygen in your 10 which will be determined by surface area, of course with plants you can keep a few more fish than normal but still i would not put 8 kuhlis in a 10 gallon! maybe just one