Numbers look good. I am thinking the test is showing 0 since the algae is using the Po4. I saw a few crabs and snails along with the clowns. Do you think you have enough CuC?
Looking at feeding, lighting and tank maintenance is there any adjustments you think you could make? Lower feeding amount or frequency, shorten lighting periods, or maybe step up cleaning are things that can help.
There are also things like cheato, algae turf scrubbers, additional bio media, etc that can be used. I would try the simplest first and go from there until starting to see results. Do a big cleaning which includes manually removing as much algae as possible, water change, swap out or remove media or sponges or filter pads.