Help! I’ve very recently re-scaped my whole tank and it’s been a day and now the water is very cloudy and there are white strings on the leaves and the sand. What are they and are they harmful to fish? How do I get rid of them? In case it helps I just put in a bubbler, soil (baked and sifted), old gravel (washed of algae in old tank water), and fine aquarium gravel on top. I got a full water change because the old water was super filthy and gross. My fish (three male guppies), snail (ivory mystery) and shrimp (one ghost shrimp) are all living in a temporary tank right now but I want to get the guppies in as soon as possible. I am also planning on taking out the old sponge and I am replacing it with cuprisorb filter media to remove any trace amounts of copper. I have a dual layer filter, it has an activated carbon filter and a sponge which I am removing. Please help me!