Please help. What is it?! Why is it?! How do I make it go away?!
Photos here:
https://www.icloud.com/journal/#1;CAEQARoQJJAzXOWajK7dQH8S05wcDw;021CF45C-CF8D-4E34-B19C-DFA51D90304B
:(
10-gallon tank, about a year old with standard, back-of-tank filter
2 guppies, 1 golden algae eater, 1...