Where can I purchase hydrogen peroxide - Surrey
 

I want to dip rocks into a bucket of hydrogen peroxide to kill pest anemones & algae .
Any recommendations where I can purchase , say 4L . I've only seen small containers & don't wanna have to buy 12.
Mark

Drug stores. Dollar stores Costco have 1l ones. May need 4..but beats 12

Hydroponic shops sell the strong stuff in 4L jugs

Went with bleach . Hope it works

ive bought it from dollar stores when i need alot

Bleach really seems to be working & fast . Very impressed. Now to neutralize the bleach.
Thanks Mark

Muriatic acid....Canadian tire $11

Bleach brakes down fast in the sun let the rock dry out then rinse . no more bleach . Or add vinegar and test the ph till it turns neutral .