Nute & Reverse Osmosis questions For Hydro

Incredible4Mr2E

Well-Known Member
Lol no worries man there are too many conversions and ever meter depending on manufacturers is different so it’s understandable.. well now u know :bigjoint: .....cheers
I remember growing back years ago. They didn’t have stuff like they do now. It’s insane.
 

curious2garden

Well-Known Mod
Staff member
I’ll have to research that a little more. Any advice or pointers you’d give someone new?
Do a search on here it's been widely discussed. UV disinfects only at the light source. Chlorine will disinfect everywhere it goes. It's also less fugitive than H2O2 another reservoir disinfectant. Finally Ca Hypochlorite also adds a little Ca. But there's no reason you can't use household bleach (Na Hypochlorite), because it's used in such small amounts (3-5 PPM)
 

MustGro

Well-Known Member
So does the PPM and TDS just get multiplied by the EC? I think someone said by like the 700
As far as I know the formula to get from PPM to EC is (PPM x 2)/1000. I use the 500 scale and use that formula to convert BUT I run my Guardian in the TDS 500 setting not the PPM 700 one. So I'm in early veg on Jack's with a low PPM. It's 210 on the 500 scale (TDS). I'm calling it PPM but by looking at the Bluelab I guess I should be calling it TDS. Anyway to convert my number to EC; I'd take 210 x 2 = 420. Divide that by 1000 to get an EC of .4. I'm pretty sure that works with the 700 scale too (PPM x 2/1000), but not 100 % on it.
I guess everybody's right though; it's easier if it's all in EC. I never thought of it that way before; I just use the 500 scale out of habit mostly because I learned on Gen Hydro and that's the scale their feedcharts were in. I know Cyco uses the 700 scale but they're the only company I can name that does.
 

Incredible4Mr2E

Well-Known Member
Do a search on here it's been widely discussed. UV disinfects only at the light source. Chlorine will disinfect everywhere it goes. It's also less fugitive than H2O2 another reservoir disinfectant. Finally Ca Hypochlorite also adds a little Ca. But there's no reason you can't use household bleach (Na Hypochlorite), because it's used in such small amounts (3-5 PPM)
When I built my hydro system I cleaned all the pipes after cut and cleaned the insides out. The first time I ran it with straight faucet water it left a white film on the sides of everything. Figured it was just from the pipes getting a soak. So I emptied the system out and refilled. Was as bad but still a white residue. The third time I put bleach in the system just to kill anything and maybe clean it out. This left a real thick white film on the sides of the buckets. Emptied the system and scrubbed it, I scrub it really good after every time I empty it. So after do that I fill it back up and empty it a couple times. I’m trying to get a system down and have it down before I setup everything and run it. Not really any white residue these times, maybe a tiny tiny bit. So I decide todo another bleach wash, only 6 cap fulls for the system. That time it left thick white residue again. Do you know if this is the bleach or is the bleach cleaning the pvc really good? Have you ever experienced this? Like I said, I washed the system good I thought a before putting everything together. I haven’t put water back into since the last bleach clean. Even after scrubbing it I can still see tiny dried white spots in places around the bulk heads and hard to scrub places. Any advice?
 

Incredible4Mr2E

Well-Known Member
As far as I know the formula to get from PPM to EC is (PPM x 2)/1000. I use the 500 scale and use that formula to convert BUT I run my Guardian in the TDS 500 setting not the PPM 700 one. So I'm in early veg on Jack's with a low PPM. It's 210 on the 500 scale (TDS). I'm calling it PPM but by looking at the Bluelab I guess I should be calling it TDS. Anyway to convert my number to EC; I'd take 210 x 2 = 420. Divide that by 1000 to get an EC of .4. I'm pretty sure that works with the 700 scale too (PPM x 2/1000), but not 100 % on it.
I guess everybody's right though; it's easier if it's all in EC. I never thought of it that way before; I just use the 500 scale out of habit mostly because I learned on Gen Hydro and that's the scale their feedcharts were in. I know Cyco uses the 700 scale but they're the only company I can name that does.
That’s so confusing lol. Yeah, just going to stick with EC for now on lmao
 

curious2garden

Well-Known Mod
Staff member
When I built my hydro system I cleaned all the pipes after cut and cleaned the insides out. The first time I ran it with straight faucet water it left a white film on the sides of everything. Figured it was just from the pipes getting a soak. So I emptied the system out and refilled. Was as bad but still a white residue. The third time I put bleach in the system just to kill anything and maybe clean it out. This left a real thick white film on the sides of the buckets. Emptied the system and scrubbed it, I scrub it really good after every time I empty it. So after do that I fill it back up and empty it a couple times. I’m trying to get a system down and have it down before I setup everything and run it. Not really any white residue these times, maybe a tiny tiny bit. So I decide todo another bleach wash, only 6 cap fulls for the system. That time it left thick white residue again. Do you know if this is the bleach or is the bleach cleaning the pvc really good? Have you ever experienced this? Like I said, I washed the system good I thought a before putting everything together. I haven’t put water back into since the last bleach clean. Even after scrubbing it I can still see tiny dried white spots in places around the bulk heads and hard to scrub places. Any advice?
I've never had that happen to me and I've used both Sodium Hypochlorite and Calcium Hypochlorite. Let's ask an actual organic chemist what he thinks. @cannabineer any ideas what's precipitating out?
 

cannabineer

Ursus marijanus
When I built my hydro system I cleaned all the pipes after cut and cleaned the insides out. The first time I ran it with straight faucet water it left a white film on the sides of everything. Figured it was just from the pipes getting a soak. So I emptied the system out and refilled. Was as bad but still a white residue. The third time I put bleach in the system just to kill anything and maybe clean it out. This left a real thick white film on the sides of the buckets. Emptied the system and scrubbed it, I scrub it really good after every time I empty it. So after do that I fill it back up and empty it a couple times. I’m trying to get a system down and have it down before I setup everything and run it. Not really any white residue these times, maybe a tiny tiny bit. So I decide todo another bleach wash, only 6 cap fulls for the system. That time it left thick white residue again. Do you know if this is the bleach or is the bleach cleaning the pvc really good? Have you ever experienced this? Like I said, I washed the system good I thought a before putting everything together. I haven’t put water back into since the last bleach clean. Even after scrubbing it I can still see tiny dried white spots in places around the bulk heads and hard to scrub places. Any advice?
What is your water like? My best guess is a hard water calcium residue. Maybe try to wash a bucket with dilute acid like muriatic (Many toilet bowl cleaners contain 8% HCl.)

If that fails, I don’t know what else without lots more data.
 

Incredible4Mr2E

Well-Known Member
I've never had that happen to me and I've used both Sodium Hypochlorite and Calcium Hypochlorite. Let's ask an actual organic chemist what he thinks. @cannabineer any ideas what's precipitating out?
What is your water like? My best guess is a hard water calcium residue. Maybe try to wash a bucket with dilute acid like muriatic (Many toilet bowl cleaners contain 8% HCl.)

If that fails, I don’t know what else without lots more data.
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