Home bleaching/balayage advice needed

[IceCreamSunday87]

Hi

I have medium brown hair naturally, last had my hair balayged in November last year at the salon.
I've bought wella blondor/ developer at 20 vol. Also got a ash toner. My question.. Will the 20 vol lift my medium brown hair enough? Or do I need to use the 30 vol developer?
My hair usaully takes bleach or colour really well.
Please help

No-one can tell you without looking at it (and arguably, being a professional) because it depends on the condition and how much red you have in your hair. Medium brown covers a hell of a lot of variables.

This is my hair

Bump

I feel like if you need to ask, you'd be best off waiting until salons reopen. Especially if attempting balayage.