Tiny clear bacteria or algae growing all over? Help!

[CrayCray13]

Hello! I have had Cichlid aquariums the past 20 years. I just got back into the lifestyle a few months ago but never seen anything like this. There is tiny bacteria "ISH" things attached to every rock and decoration in the tank and it is starting to attach to the glass. I have a 75 gallon tank and it is 2 months old. Initially it had a bacteria bloom the first week but water has been crystal clear since and still is. I have natural gravel and rock with fake plants. I have 7 cichlids, a pleco, cat and a vanilla crayfish. All are seem super healthy. Temp is at 78.5. Ph is 8.3 . Nitrates and Nitrates are low. I have a Marineland c360 canister filter. And have done 20 gallon water changes every 2 weeks. Please help! I attached a pictures. Thanks!