you are retarted!! h202 will make the great white useless.... do some reserch before you ruin someone elses grow. he just spent 50+ dollars on great white and with you're advice he might aswell have thrown the money out the window... h202 sterilizes everything and renders benificial bacteria and...
peroxide will kill the benificials in the great white and render it useless. you can only use one! but like i said soft rot or daamping off can be cured with great white not peroxide..