What is the fuzzy stuff floating in my fish tank?

Question

I think it might be uneaten food but im not sure, because i only started noticing it when i changed to bigger fish flakes and ive noticed my fish dont eat it all in like 10 seconds like they used to, but it wont settle to the bottom and allow my snail to eat it ... if it even would i do not know... suggestions on what is it and how to fix it please

Answer 1

yeah its probably just the food, don't put as much it or scoop it out when it get fuzzy

Answer 2

Yeah its actually mold growing on old food.

If they don't finish the same amount in less time, then feed a lot less.

Never let food go to the bottom.  

What it does is just what you've seen.

It breaks down into your water and will muck up your tank, lowering the water quality and potentially putting your fish at risk.

Remove it immediately and feed less, or get smaller flake food more appropriate for your fish.