HELP ! Tiny white larva in my hydro / grow solution

OK. Im into the 3rd or 4th week of flower, and as I topped off the water in the basin, I noticed there are hundreds of little white microbial larva in the water where my roots swim. This cant be good. Anyone familiar with this? I imagine a fruit fly or something maybe got in there, laid eggs, but I dont see any flies.

Does someone have a viable solution for this?
Dont want to lose this important batch Ive been without for months.

Help a brother out?

AZA-Max get rid of them?

can someone pls answer this for me my crop is in trouble

No idea as I grow soil but can't you empty and clean the basin?

Change the res to get as many out as you can and then try the azamax, should get rid of them. Just keep a close eye on it to see if you need another treatment