H202 35% against fungus gnats ?

I have had few gnats flying around here and there but it's now getting worse.
Lots of them are flying and lots are dead on no pest strips but there is a lots of larvae as well, i've been searching google on how to kill fungus gnats h202 35% and some says it will kill them, some says it won't.

I am wondering if anyone already faced a similar problem and succeeded killing them with h202 35%? If so at what ratio water/h202 25%?

Thanks.

I am now pretty sure that h202 will not kill larvae, I took few a dropped them right into the 35% h202 solution and they died after about 30 seconds, i can't beleive 1 part of 3% to 5 part of water will kill them.

It's funny to see them exploding after 2 mins. in the 35% solution.

I have a fungus gnat problem about 4 months ago, and it was really bad. I didn't try any other chemicals than neem oil, and I think the little bastards actually liked the stuff.LOL What did work, was a layer of sand on top of the soil. I used playbox sand, which i think is a little different than regular sand, in that it made watering a pain in the ass. As strange as this sounds, the water didn't want to drain through it when I used it heavily. So, I used a spice shaker bottle and lightly sprinkled the sand evenly over the next batch of pots, and that worked alot better. What i ended up doing, was pouring some water on top of the soil, letting it soak for 10 minutes or so, then went back to finish watering after it soaked. That prevented dry spots, and allowed the water to flow evenly. It's a bit of a hassle, but worked great.

I never tried H2O2, so i can't help you there.

Hey jaw,

Thanks for the advice and sorry i should have mention that i am hydro flood and drain with hydroton/rockwool.

gnat off in the nutrient solution

and

Agrothrin - sprinkle it ontop of the soil

works a treat

i'll that a try and i will put lot more yellow traps, thanks.