Hi this is regarding my star tortoise whom is about 15yrs old. I tested his urine today and found out that his ph is 5(acidic). Did some research and found that a tortoise urine should be alkaline. My tortoise diet is wheatgrass, mazuri, zoomed grassland and exoterra pellets and chopped hay sprinkle on his wheatgrass. I know should not be feeding too much commercial food but living in my country here i do not have much choice. Am already getting some seeds like roselle, dandelion, clover etc to grow for him but they are not ready to be fed to him yet. So at the moment i can only rely on commercial food or store bought greens which dosen have much variety also. So any idea how come his urine is so acidic since the pellets are also timothy hay based ones?