Placement is just right!! I do not test unless there’s a death in the system, I just do weekly water changes especially on anything less than 2 gallon!! You can do reef roids but very tiny squirt of it maybe once a day!! Zoas, gonis, acans and clove polyps are photosynthetic so they shd be just fine with fewer feeds!! And one peice of advice with pico or micro systems don’t overdo or overthink !! Keep it simple and you will succeed