I have a new 10g tank with two Platy ( a Red Wag and a Sunburst), one Molly ( Black Molly), one Tetra ( Green Neon Tetra), and one Guppy( Tequila Sunrise Delta Guppy) in it. My tank is about 79-80 degrees. The water hardness is 30 mg, the alkalinity is 40 mg, the pH is 7.0, the nitrite is 0, and...