Seems like I should know the answer but alas…
I use tap water through a chlorine/chloramine filter. After the filter, the PPM (500 scale) is about 200. What I’ve been doing to measure nutes is to take the PPM of the nute solution, and subtracting 200.
But if I do that, my PPM are consistently low, and I’m adding nutes.
Is that right? (Subtracting 200?)
I take runoff ( EC 1.4) and x 500=
1200 (PPM)
Oh sorry. I’m RDWC…
Lol. ok. just in case you move to soil.
I believe that you should count the 200 PPM in with your total ppm level. I’ll tag a couple of people who may know for sure.
@Myfriendis410 @PurpNGold74
Absolutely: it’s additive and will contribute to nute burn if not accounted for. This is why a lot of folks use R/O so the plant can see a full load of (known) nutes.
Some do, some don’t.
You may be able to call customer service and get that information.
Does anyone have experience with the bluelab truncheon? I was going to snag one up but figured I’d hold off and let some of the people in the know , chime in. I’m new to growing and want to make sure I get the right(quality) thing.
The Truncheon is a very nice meter. But it is pricey. I love mine. If you already have a quality light I’d say go for it. If not that money would probably be better spent toward lighting
Thanks bro! Definitely getting one.
You can take any water to get it tested at a well drilling company . Google search can bring up the closest to you, then you can ask if they test there or send out to be tested
Doesn’t matter because some sources of things like calcium and iron in your tap water aren’t plant available. You should count total concentration of your solution and then add or subtract whatever elements your plants tell you are in excess or deficient. Or, move to using stripped water.
Found this!
You can also calculate your desired ppm this way using basic arithmetic.
I use this all the time, it’s extremely useful.
Xinobyte’s tap water is 150ppm and wants to water his plants at 400ppm.
How many grams of fertilizer per litre should he uses?
Note that his pH down adds up 20ppm.
Equation
400ppm - 150ppm - 20ppm = 230ppm
230000ppm / 356700ppm = 0.64g/litre
Proof
(356700ppm * 0.64g/litre) / 1000ml = 228ppm per litre.
Xinobyte should use 0.64g per litre.
