Ever since my setup has been running I have been doing my normal 20-30% water change and water tests evry week,my results never change apart from this week.My results are always as follows

ph= 6.5
nh3/4= 0
no3= 0
no2= 0.3
I test my water before my water change just to see how it is doing before new water is added.Today before my water change my results were

ph= 6.5
nh3/4= 0
no3= 0
no2= 0

Is this ok to see 0 across all 3 tests?

Its unusual for the nitrate to be zero, what does it read at the tap?

How old is your test kit? sometimes a old text kit can lead to stray results.

my nitrates are 0 also tapwater's clean here but the ph is on the hi side like 7.2/7.4

You have 0 nitrates out the tap!?!? Jealous!!! My Ph is around the 7.8 mark.... But fish do adjust