I just got a hanna checker and found out my phosphates were .16ppm. I had API before and it always measured 0. I have a 12g nano and I've read/heard that something like phosban wouldn't be good for a tank so small. I've seen chemipure elite and nopox in other posts but don't know if those are good options either. I'd appreciate all the help I can get! Fwiw, I don't have any green algae at all, but this number seems high. Help!!!