I got 6 cichilds when i was on vacation. Did not think to get the nane. thaer color is like that of a garaff. Lake Tanganyika. to young to tell males from females. the tank is 38g. water is PH 6.6 KH 3 GH runs from 3 to 5 most of the year it is 5 . is this good? i have a bottom filter and a small ...