That acro i gave you needs alot of light and alot of flow. Very good water quality and the Nitrate should be below 10ppm. Since your tank is new i would doubt you have problems with calcium and alk. But whether you use RO/Di water matters too.
And you told me you fill up your tank with distilled water from stores, The still they use to make the water might not be made of copper, but alot of times the return line from the still to the resovior is made of copper, you might want to use a different kind of water. Just get some from my house, i have over 100Gallons just sitting here.