I have 5 freshwater tanks ranging from 5 gal to 55 gal. I perform a 20% water change weekly on each of them. I've been trying to get the water from the faucet to approx. 78 degrees with each change. Recently, a fairly large fish supplier told me that I should never use heated water from my house water heater because it will contain some traces of copper.
I never heard this before and my fish all seem to be healthy. Can anyone comment on this?
I never heard this before and my fish all seem to be healthy. Can anyone comment on this?