Spider Web?

Question
We have a new 5 gallon Hex tank with 2 bala sharks and a plecostomus. We
added some live plants a few days ago and now have a grey moss like spider
web looking stuff growing everywhere. What could it be and how do I get rid of
it. I have already done a 50 water change, what else?
Thank you

Answer
It is most likely fungus you may want to treat the water. The bala sharks will eventually need a bigger tank as will the pleco as they both get up to a foot long. But water changes and treating it with medication for fungus the best thing you can do right now.