Brown Stuff On Sand (no Its Not Poop)

[D4N]

i am geting brown stuff on my sand i just cleaned my sand 2 days ago and it is their already

it is mainly at the back about 20cm around the bog wood it is proberly from the bog wood

how do you stop this haperning

ty

 

[samyboy]

is the bogwood a recent addition ?

 

[D4N]

is the bogwood a recent addition ?

well 6-7 weeks