urgent help needed
- Thread starter padz
- Start date
yea mate your rite i was going by a schedule from a man who told me i don't need a bloody ec meter!!!!!!!!!! im using tape water, the tap water is 6.9ph before i add the nutes im using canna hydro vega on the back it says use a maximum of 40ml to 10 litres ive just tried 25 and the ec seems high, whats the maximum i should have for the ec, ill have to buy some ph up tomorrow only have ph down
m420p
Well-Known Member
How old are the plants? 2.8 EC is high for even full grown blooming plants.
m420p
Well-Known Member
Oh, you barely want any nutes in your tank then man otherwise you will burn them. They will be fine with just tap water at the moment, if your tap water isn't crappy, what EC is your tap? This is what I go by for a growing schedule related to nutes:
Seedlings, Early Sprouts .2 to .5 EC
Early Vegging .6 to .8 EC
Full Vegetation .9 to 1.4 EC
Early Blooming 1.5 to 1.9 EC
Full Mature Blooms 2.0 to 2.8 EC
m420p
Well-Known Member
.4 EC water is borderline usable in hydro. You could try sticking with it and see if your tap water works well but I would honestly just use distilled, RO, or rain water. Then you KNOW whats in your solution. If you decide to use your tap, just start out with no nutes and when you add nutes, don't forget to calculate in your EC of your tap water. I would just empty your res.(and even save the solution in jugs or bottle for later on) and just use water at the moment. PH will change all the time, thats why you need these:
ak.fortyseven
Well-Known Member
Electrical continuity, the more dissolved solids n water helps electricity pass thru the water.
ak.fortyseven
Well-Known Member
EC= electrical conductivity*
ak.fortyseven
Well-Known Member
Total Dissolved Solids (TDS) is the best measurement of the nutrient concentration of a hydroponic solution. To estimate TDS, one can use a meter that measures the Electric Conductivity (EC) of a solution, and convert the number to TDS in parts per million (ppm). Many meters will do this conversion.
Total dissolved solids (TDS) is typically expressed in parts per million (ppm). It is a measurement of mass and determined by weighing, called a gravimetric analysis. A solution of nutrients dissolved in water at a strength of 700 ppm means that there are 700 milligrams if dissolved solids present for every liter of water. To accurately calculate total dissolved solids (TDS), one would evaporate a measured filtered sample to dryness, and weigh the residue. This type of measurement requires accurate liquid measurement, glassware, a drying oven, and a milligram balance. Example: 50 mL of the 700ppm solution would leave 35 mg of salt at the bottom of a crucible after drying.
Electrical Conductivity (EC) is expressed in siemens per centimeter (s/cm) or milliseimens per centimeter(ms/cm). It can be determined with an inexpensive hand held meter. Nutrient ions have an electrical charge, a whole number, usually a positive or negative 1, 2, or 3. EC is a measurement of all those charges in the solution that conduct electricity. The greater the quantity of nutrient ions in a solution, the more electricity that will be conducted by that solution. A material has a conductance of one siemens if one ampere of electric current can pass through it per volt of electric potential. It is the reciprocal of the ohm, the standard unit of electrical resistance. A siemens is also called a mho (ohm backwards).
For convenience, EC measurements often are converted to TDS units (ppm) by the meter.
Total dissolved solids (TDS) is typically expressed in parts per million (ppm). It is a measurement of mass and determined by weighing, called a gravimetric analysis. A solution of nutrients dissolved in water at a strength of 700 ppm means that there are 700 milligrams if dissolved solids present for every liter of water. To accurately calculate total dissolved solids (TDS), one would evaporate a measured filtered sample to dryness, and weigh the residue. This type of measurement requires accurate liquid measurement, glassware, a drying oven, and a milligram balance. Example: 50 mL of the 700ppm solution would leave 35 mg of salt at the bottom of a crucible after drying.
Electrical Conductivity (EC) is expressed in siemens per centimeter (s/cm) or milliseimens per centimeter(ms/cm). It can be determined with an inexpensive hand held meter. Nutrient ions have an electrical charge, a whole number, usually a positive or negative 1, 2, or 3. EC is a measurement of all those charges in the solution that conduct electricity. The greater the quantity of nutrient ions in a solution, the more electricity that will be conducted by that solution. A material has a conductance of one siemens if one ampere of electric current can pass through it per volt of electric potential. It is the reciprocal of the ohm, the standard unit of electrical resistance. A siemens is also called a mho (ohm backwards).
For convenience, EC measurements often are converted to TDS units (ppm) by the meter.
hellraizer30
Rebel From The North
10 litres in a flow and grow that has a 55gal res why only put 10 litres =2 1/2 gals
also you can use plain water to raise your ph,
Bernie420
Well-Known Member
Thanks............
ak.fortyseven
Well-Known Member
Word, dont be fooled..... Google ftw!
Prefontaine
Well-Known Member
your ppm machine uses a math equation to calculate approximate ppm from EC which it actually reads, boom goes the dynamite