ec/ppm
- Thread starter zander19
- Start date
SableZen
Well-Known Member
With hydroponic growing systems, EC/TDS is used as a measurement of nutrient strength in solution. EC is electrical conductivity. The more "stuff" in the water, like nutrients, the greater the electrical conductivity of the water. TDS is total dissolved solids, which is based upon the EC reading and is really just a best guess at what the parts per million (ppm) of the stuff in the water might be (a conversion from EC to ppms).
You don't strictly need an EC/TDS meter to do hydroponics but if you want to tailor a feeding regimine and have much idea of what's going on with your plants and nutrients - you will want one along with a pH meter.
You don't strictly need an EC/TDS meter to do hydroponics but if you want to tailor a feeding regimine and have much idea of what's going on with your plants and nutrients - you will want one along with a pH meter.
PopaShank
Member
HOW MANY PPM SHOULD IT BE? IS IT DIFFERENT IN DIFFERENT STAGES?
I've got both meters, ppm and ph. I added all the nutes from General Hydroponics Flora Grow system.
I keep adding ph down till it gets to 5.5 - 6.0, I've got that part down.
Then I keep adding water till the ppm gets to 900.
My AF plants are in week 9, full on budding.
Is 900 ppm too much?
What should it be?
So far they are doing great, just wondering if it could do better.View attachment 3009511
I've got both meters, ppm and ph. I added all the nutes from General Hydroponics Flora Grow system.
I keep adding ph down till it gets to 5.5 - 6.0, I've got that part down.
Then I keep adding water till the ppm gets to 900.
My AF plants are in week 9, full on budding.
Is 900 ppm too much?
What should it be?
So far they are doing great, just wondering if it could do better.View attachment 3009511
alwaysgreen420
Active Member
No 900 is not high. Different strains will take different levels.
Sent from my SCH-I545
Sent from my SCH-I545
SableZen
Well-Known Member
Looks like you are doing pretty good. The EC/ppm that you'll want varies on things such as plant size/age, nutrient line, strain, lighting intensity, temperatures, type of hydroponics system, etc., so there's really no catch-all "this is a good ppm" for every plant in every situation. But by measuring the EC/ppm, you will have a precise metric to go by for tailoring your own future grows with your specific setup so you can dial things in for improvements. Measuring the EC/ppm will also let you know how much the plants are drinking vs. uptaking nutrients at any given point.
So yeah, you still pretty much have to start with a baseline (like the feeding schedule your nutrient line recommends), get your EC/ppm readings periodically, watch the plants (which are looking pretty good btw), and go up or down with nutrient strength next res change, record results, and then the next grow you'll have enough info to run your own tailored feeding schedule and should get improved results.
Bryon240
Well-Known Member
hello I am at like 2000 ppm and higher cause my meter only goes up to 2000. I just read this thread I have a question...if I put in my nutes and ph down, won't everything change if you add water to thin solution to bring ppm down? My plants are growing like they are in containers 4 time the size they are really in. This is my first time growing with terraponics and it is going well so far. I have 15 skywalker and 5 lsd and 4 mr.nice 3 whitewidows 12/12 from seed and 1 blue magoo. thx
Bryon240
Well-Known Member
View attachment 3011086this what my plants look like a week ago.
Bryon240
Well-Known Member
I am wrong and I guess my eyes need to be checked...lol....my PPM is at around 700 - 800 between tables...sorry for that.
kryptoniteglo
Well-Known Member
700-800 is perfect. With 2000 I would expect to see dead plants.