Flourish Comprehensive and invertebrates ...
Hi, folks! I'm new to this forum, and I have a 20-gallon-high freshwater, coldwater tank with red cherry shrimp, several snails, whitecloud minnows, zebra danios and some glofish danios. I also have anubias nanas, java ferns, marimo mossballs and some floating hornwort, anacharis, java moss, water sprite and riccia. The anubias are attached to plastic plant bases that fake plants used to be anchored to, and the java ferns are tied to various objects with fishing line. None of the rhizomes are buried in the gravel, because in my research I learned you aren't supposed to bury the rhizomes.
My question is this: Does the Flourish comprehensive formulation contain any copper that would harm invertebrates or fish? If I use it, I plan on using a very low dose, as Anubias and java ferns don't normally need to be fed. I have some that look like they could benefit from a little extra besides the nitrates they naturally absorb in the tank.
I have low-to-medium light (depending on where the floating plants drift to), and no CO2. Don't intend to use the latter.
My water's pH is 7.5, and parameters are zero ammonia, zero nitrite and nitrates around 10 to 15 ppm.
According to my copper test kit, the tank currently has no copper in it.