There are several solutions.
1. lights off & more water changes
2. diatom filter
3. UV sterilizer
4. dump in a bunch of daphnia to eat the green algae. End result, you have a bunch of daphnia to feed the fish.
1. lights off & more water changes
2. diatom filter
3. UV sterilizer
4. dump in a bunch of daphnia to eat the green algae. End result, you have a bunch of daphnia to feed the fish.