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I do this:

If using 3% H2O2, then it's 17 mL\L. If using 35% it's 1.7 mL\L. You can use it with HygroZyme, howeve since I started using HygroZyme I haven't had to use H2O2. H2O2 won't kill pythium, it will only somewhat control it.

Skip the H2O2 and buy some HygroZyme, it'll solve the problem.

Dude, yer flushing to much and not giving the HygroZyme time to work. It takes about a day or 2 for new roots to start growing and about a week to 10 days for the HygroZyme to eat away all the old roots which are infected. Yes you will lose all the old roots, but it's ok the plants can handle...

HygroZyme is better anyway. I was using H2O2 but it just couldn't keep up. HygroZyme is the way to go. But it is expensive, I get it for about $26 per liter localy in the hydroshop in town.

Here is my experience with root rot, algae, and or pythium, or whatever the heck I had in my res water. Slimy roots that gradually turn brown, starts with white slime and it progress thru to brown slime, the roots start dying off and clumping together. Started using 17ml\L of H2O2. Worked pretty...

When I ordered mine I waited 7 days and finally called them, they said it would ship the next day. it still took like 10 days after that to get it. I got the feeling they wern't gonna ship it untill I called.

Keep using the hygrozyme as per label directions. My res temp stays very high, 75 -81○, due to the 400w mh and small grow room. Therefore my roots looked like yours. I used h2o2 but had to keep using it every 2 days to keep them white and algae free, a constant battle. But the hygrozyme...

I started my 400 MH lite at 24" and let them grow up till it got about 16" away and had to move it up 2 inches today as it was starting to heat up the back of my hand a little too much. So my plants are 12" tall now and the lite is up at 18" above that. :weed:

Depends on what your going to do with the pump and what GPH it has. As for the warning lable thingy, ignore that. You'll be fine pumping water with nutrients. I personally would not use aquarium gravel as it does not hold water, or air, like hydroton would.

Oops, I do apologize. I was fucked up last nite and that was rude of me, sorry.

Hey Purp, I read where you used to use GH nut's. Did you use the weekly feeding schedule like at this link: http://www.gthydro.com/images/feedingcharts/GH_Feed-Chart.pdf Or the one like at this link: http://www.genhydro.com/genhydro_US/feeding_charts/GH_KeepItSimple_Recirculating.pdf There...

Hey Purpdaddy, Sup dude? Isn't durban poison supposed to be sativa? And afgan kush is a indica. Yet all your pics look the same, short and thick. I got northern lights growing at 16 days now and there tall and lanky, and pure indica.

Here is a few pics at day 13.

I think you need to send that RO system back and get another one, that dealer is lying to you. I got mine last week, a 4 stage. The directions siad to let it run a hour before capturing water for use and so i did. After the hour the PPM was and is 0. I got this one, for $129...

Looks like you and me are at about the same stage of growth, check out my grow journal at https://www.rollitup.org/hydroponics-aeroponics/141354-bubbleponics-1st-time-grow.html Here are a couple of mine: Northern Lights at 8 days in hydro.

Hydro seems pretty easy to me ... but my setup is in a 4x5x8 closet and the MH light puts out some serious heat. Even with a vent into the attic my res temps hover between 75 and 85○. And that causes algae to grow really fast in the tank. I keep having to add h2o2 to kill off the algae. I...

Yeah it has fittings to hook up to the sink faucet or garden hose, comes with the system. That way you don't have to tap into the water lines or waste lines. It comes with filters already in the units and they give you an extra set also. And yes it really, really works. 0 PPM, PH 6.5. But like...

Ok. It's been 8 days now since seedlings went into hydro. Gave up monitoring the EC as every measurement so far has shown it to be 2x times the PPM. PPM at 490 PH 6.3 They are growing pretty good I think. More pics below

Yeah, my tap water is is about 400 ppm, and 7.7 pH. I bought a Reverse Osmosis system. $129.99 http://www.bulkreefsupply.com/RO/DI-Filters-&-Systems-RO/DI-Systems/c9_10/p603/Economy-4-stage-RO/DI-unit/product_info.html Upside: The water that comes out is 0 ppm, pH 6.5 Advertised at 75...