Reservoir smells horrible...root rot?

[testiclees187]

Hey guys I need your help I have 4 babies 3 weeks into flowering and ive noticed in the past few days that my reservoir water smells horrible...something along the lines of a fishy, aquarium type smell that wasnt there a week ago. I added a couple mL of h2o2 earlier today because I assumed something nasty was there. Its a 3 gallon reservoir should I flush it or what? I dont want the girls getting ruined at this point. Thanks

[dnno]

yeah flush it for sure. if you can get the 30-35% h202, add like..1/4 teaspoon to your fresh water, let sit for 20 minuets, then add your nutes. Give it a few days and it should get better.