Level 4 hair neutralising red undertones

[pinkcandyclub]

hi everyone I’m a natural level 4 with red undertones I use wella ct 4.0 4% twice a year as the sun lightens my hair which exposes a lot of red/copper undertones. I don’t want to use a permanent or semi green/ash tone as I don’t want a regrowth. What would you guys recommend is there a green shampoo and conditioner just to naturalise it slightly. If there is what what you guys recommend? Thanks