Question about aquarium

[Fishscale902]

Hey guys I recently noticed this white fuzzy substance accumulating on my aquarium lid and it’s almost multiplying by the day. Soft at the touch, is this harmful to my livestock ? And what is this. ?
Anomia 0
Nitrite 0
Nitrate 0 normal
PH 7
(Used to have a lot more fish but got rid of a few and a couple had Bactria infections and did not make it)
Currently socking :
2 female blue opaline gouramis. Get together alright. Small “play fighting” here and there. Black substrate, used to be full of live plants now down graded to a few live plants due to filtration issue with small plant bits accumulating around the filter. 1 fake drift wood decoration. And 1 fake Woden ship decoration. Feed them premium flake food , blood worms and some brine shrimp

Please help. Thanks

 

[BBradbury]

Hello Fish...

If you keep a very clean tank. A tank that gets lots of large, regular water changes, then there's nothing that's going to impact the health of the tank or anything else. This looks like a little fungus. This stuff develops where there's a nutrient source. Could be some food splashed up underneath the hood and the fungus has grown. You can simply clean it off and be more careful when feeding or get some Ramshorn snails from the local pet store that carries fish. The snails will remove the fungus for you.

B