Someone tell me how nitrates could be about 40 in a 55gal tank with 2 koi/1 comet but 80 in a 300 gal pond, over roughly the same period of time. I'm so confused.
EDIT: Also, I can't tell if this little endler guppy adores my regular male guppy or is harassing him. He is constantly following him, sometimes really closely, but I don't see nipping from either one. What's going on?
Here's the halfmoon girl I got a few days ago.
And the king betta that had mild velvet and is still kinda iffy on survival.