We have a betta in a 1.5 gal tank with a heater. Just did a 50% water change on Weds night. I noticed this morning a white fuzz developing on the bottom of the heater. There are a few particles floating on the surface too.
Our betta seems to be happy- he is super active, eats, no signs of stress or illness.
How do I wash the heater? And how can I wash the glass? I know I'm not supposed to use soap but rinsing doesn't seem to do much. TIA!
Edit: oh and the fuzz has appeared since we upped the temp to above 75 degrees. He loves the warm water, but I am afraid the fuzz will hurt him!