A healthy tank is supposed to have a ton of microfauna, esp. in a planted tank. No need to worry! They are good source of food for frys. <People cultivate that specifically for that purpose - aka infusora/green water.>
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.