I kept a red scooter dragonette (not the same, but similar with diet) in a 10g for 6 months before upgrading systems.
My trick was this little bottle. I drilled the holes, filled with chaeto, then did two orders of 1250 copepods two weeks apart and used a turkey blaster to add them into the bottle. Less than a month in, the tank has an unbelievable amount of pods! I also use phyto and syringe it into the bottle once a week. Would suggest 10/10, especially if someone doesn’t have a sump/fuge like me.
Just make SURE you use glass. All plastics (even FDA human baby proofed plastic) will leach horrible chemicals into your tank.