rootfingers
Active member
00420 said:sm-90 took out my gnat prob..... rootfingers maybe you just did not use enuff?
Didn't use enough?
Maybe.
I did a 5 to 1 mix (water to sm-90) spray six times over a four week period and did 5ml per gallon in my rez. I burned through a gln that cost me $65 in that time period. After I sprayed, if I looked closely I could see agitated larva come to the surface but they didn't seem too worried and they certainly weren't dying. The same (didn't tag them so not totally conclusive about them being the same, lol) larva would be hanging out hours and days later.
Now it could have to do with the gestation and life cycles of the gnats but I hit them with a strong spray once a day for three consecutive days and once a week following, and that should have interrupted those. I think the main reason that the sm-90 didn't work for me is because I am in coco. Not that you don't already know this, but in coco you have a top surface that never dries, it is always very moist. The larva seem to thrive if given a moist area close to the surface of a dense media. My mothers are hardly touched at all and they are in a peat based mix that I let get real dry between waterings.
From my own experience I can only conclude that sm-90 has less to do with getting rid of fungus gnats in coco than the fact that the surface is constantly moist.
If you don't mind me asking, what media were you using when the sm-90 worked?
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