comparability with 20 gallon truvu

Hi my name is Aiden, i have a 20 gallon truvu that has been cycled for about a month and a half that has 2 black ocellarus clowns, 2 domino damsels, watchmen goby, tiger pistol shrimp, fire shrimp and 2 blue leg crabs. wondering if i have to many fish or if the damsels will go after new fish. they went in great with the clowns and the goby. and i want a anemony for the clowns. any suggestions. i know i can’t put one in for a few more months.

salt: 1.025
nitrates:10ppm
phosphates:3ppm
calcium:360ppm
alkalinity:9
ammonia:0ppm
nitrites:0ppm

i might have messed up on the chemicals. but when i tested everything in front of me it was perfect.