What did the sand do to my fish tank!?

[Samadec]

Recently set up a small 15 gallon tank. Thought sand would look good, so I washed it well and poured it into my tank. 24 hours later, the sand has settled and the sand has become web-like. No fish in the tank, but there is a statue and it's covered in stringy looking webs and the sand on the ground has a small layer as well. Anyone know what's going on in my tank?

 

[Homedog98]

Recently set up a small 15 gallon tank. Thought sand would look good, so I washed it well and poured it into my tank. 24 hours later, the sand has settled and the sand has become web-like. No fish in the tank, but there is a statue and it's covered in stringy looking webs and the sand on the ground has a small layer as well. Anyone know what's going on in my tank?

Pictures?

 

[jetajockey]

what kind of sand did you use? Did you rinse it first?

 

[Samadec]

the sand is substrate, and yes, i rinsed it before putting it in the water.

 

[Samadec]

To be more specific, the sand is "Super Natural's Premium Aquarium Substrate." I've also attached a close up of the webbing that's formed in my tank.

 

[Samadec]

As you can see, the webbing has covered the top of the sand and the figure in the tank.

 

[reefdiver]

What kind of dechlorinator do you use? Have you added any other chemical to your rank?

 

[Samadec]

The substrate came with a packet of Bio Magnet packet which I put in the tank. I also added 5mL of water conditioner and a PH corrector tablet.

 

[hippy guy]

Have you tried stirring the substrate up? Is it sticky, or sand like? Also, was the bio magnet product for fresh or dalt water?