LOG10 and SQRT transformation

Good afternoon,
I am comparing scales of optimism, subjective vitality and hope between two nations- so i need to do t-test and ANOVA.
My data are not normally distributed with negative skewness so I tried to transform the data through log10(max value+1-variable) and root square transformation SQRT(max value+1-variable) and for some scale i got the Saphiro-Wilk test of normality sig>0.05 after using root square transformation and for some after log10 transformation.
Maybe a stupid question but do I have to choose only way of transformation or I can work with both of them? F.e. compare SQRT_LOTR_CZ and LOG10_LOTR_SPAIN?
Thanks for any reaction. Anna