Spidermites are orange and have a white web you can barely see. Those look like thripes or aphids. Best way to get rid of them are pyrithrum bombs, they make small ones. Once a week for 3 to 4 weeks to brake the life cycle.
Most stuff you soak your plants with will do as much damage as the bugs.

Either that or kill them all clean up good with chlorine water mix and start again.