In my 37 gallon community tank I have an artificial floater with tiny leaves. Today I noticed that much of it is covered in some brown stuff. Is this algae or gunk developing due to food falling from the top. It's about where a decent amount of food settles. Not to say that I feed much...I'm *very* stingy with the food, but of what little falls down, most would settle here. I don't see the brown stuff anywhere else, but it would be hard to see with my black backing, black substrate, the natural coloring/fake algae on my artificial driftwood, etc.
In my 3 gallon tank, which houses one African Dwarf Frog, there are 3 pieces of slate on the bottom. Two splotches of brown stuff have appeared on the slate. One is about the size of a quarter, the other about the size of a nickel. Again, not too easy to see on some other surfaces if it is anywhere else. I seriously doubt this could be food. He's fed in a dish and hogs every bite.
What do you think I'm seeing?
Thanks for your time! My tanks thank you too.
I'm seeing a strange substance in two different tanks.
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