white driftwood

I have a 40 gallon tank and I just recently set it up a week ago I have a weird bacteria or fungus growing on it can anyone help me identify what it is and how I can prevent it from spreading also can it be harmful to my fish if I don’t react to it? Also if you have any general tips for...

HELLO!! So Yesterday, I took all the remaining plastic houses in my tank and replaced them with real driftwood. I want my freshwater tank to be all natural with just plants and driftwood. All my levels are looking good. 0,0,5. But today I noticed some white on the driftwood I put in just...