dear friends,

i started s/h some time back and now i think the plants are establishing themselves rather well. but i noticed there are these moldy webs on the stone surfaces and also in around the drain holes. what do you think they are? i do not think they are spider/mites webs, but just moldy threads. some time back i got some furry molds but after i sprayed with diluted bleach i got rid of them. now i got this.

is there a safe way to get rid of them, are they harmful to the plants?

chung