Gray Spots in Sand

[Mashpotatoes74402]

Sand is only 1-2" deep I have a wooden oar/paddle in the tank The actual paddle is is where I discovered it. There were some spots that fell in? Like the sand caved in on itself I stirred it up just to see what was goin on and uncovered a huge amount of grayish sand under the surface

 

[Mashpotatoes74402]

Big gray spot!

 

[Mashpotatoes74402]

Normal sand

 

[Mashpotatoes74402]

Found more gray!!!!

 

[Starka]

I get the same thing in my tank. I have no clue what it is. :/

 

[Mashpotatoes74402]

I've heard of a really toxic "grayish " bacteria that can grow in sand. Kindaaaaaaaa worried

 

[Starka]

Oh, ya that might be bad. Ill see if research it to find out.

 

[Starka]

Do you have any fish in the tank?

 

[Mashpotatoes74402]

One Oscar 3 silver dollars. And 6 snails and one crab.

 

[Starka]

Ok so far I have read this: you need 3-4 inches of sand to produce the toxins and the fish would be gasping at the top of the tank if the toxins were in the tank. I would do a couple of water changes and make sure to stir the sand up, just in case. If your fish seem normal, I would just keep an eye on them.