I'm new to fish keeping, and recently set up a 55 gallon tank, it ran for about a week with a 5 inch pleco, and 2 pink tux platys, then I added 8 pink jewel tetras, 4 platys, 4 mollies, 4 red tail loaches, 2 bumble bee cats, 2 albino bristlenose, 2 guppies (male and female)and 2 american...