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Both types of lighting are capable of providing enough light to allow
photosynthesis. But they differ in the light spectra they have at their
disposal.Thus LEDs have the particularity of offering a perfect
combination of colours that ensures energy saving and avoids waste,
making LED technology more efficient than sodium lamps to power
photosynthesis. Indeed, all the light emitted by LEDs can be assimilated
by plants, unlike HPS lamps, which produce little light that is really
useful for plants.
When choosing a LED grow light, it is important to know the difference Advertised Wattage and Actual Wattage;
The advertised wattage (LED Watts) is obtained by multiplying the
number of diodes by their theoretical wattage. For example, a LED grow
light may have 140 x 5 watt diodes so its advertised wattage would be
700 LED Watts.
- The actual wattage (True Watts) can be obtained by
looking at the product’s power output specification. For example, that
700 LED Watts grow light above may have 315 True Watts.
companies only use the LED Watts when advertising their lights since the
number is always higher and more impressive than the actual power
output (True Watts)
The fan and filter combo must be mounted inside the tent in order to
create negative pressure. By opening the air vents on the lower parts of
the tent, outside air is sucked from the bottom, passing through your
plants and into the fan.
Having the exhaust of your ventilation system going directly to the
exterior is mostly to deal with the humidity and extract all the "used"
air to allow fresher air in, it will deal with some of the smells but
that will not be sufficient, filters are required for this application.
The most precise formula is to calculate volume of the grow room as you
did (LxWxH), the extraction fan should be able to adequately exchange
the air once every three minutes. Therefore, volume in cubic feet / 3. Once you have that result, add the required CFM to operate the filter
First place the black matrix disc in the pot, this will prevent any
media from escaping and blocking the aquavalve, then add a 1 to 2" layer
of washed gravel or perlite or pH stable clay pebbles to the bottom of
If using an air dome then cover the domes 2/3rds up with
washed gravel/ perlite/pH stable clay pebbles. Air domes will help more
oxygen get to the roots of your plants, which will promote healthier
root growth and increased yields of up to 30% Fill the rest of the pot
with a 50/50 mixture of coco or soil with perlite or clay pebbles.
AutoPot systems don’t use a water pump. Instead, they use gravity to deliver feed to the pots.
To do this, it’s important that you place your reservoir at least 6 inches higher than the top most Aquavalve.
Unless you purchase individual Air domes for each pot, the AutoPot system doesn't require an air pump to operate.
Use a pH meter (digital or dropper) to measure the pH of a solution. If the readings are too high, add your pH down product, mix thoroughly and measure it again. Repeat until the readings are adequate.
PH is a measurement of the
concentration of hydrogen and hydroxyl ions in a water-based solution.
It is measured on a scale of 0-14, with 0 representing a very acidic
solution and 14 representing a very basic solution. In an acidic
solution, there are more hydrogen ions present than hydroxyl ions, and
in a basic solution the opposite is true. A minimal change in pH
corresponds with a major change in the concentration of hydrogen ions.
For example, a solution that has a pH of 6 is 10 times more acidic than a
solution with a pH of 7. Every plant has a different ideal pH level, so
when you are considering setting up a hydroponics system
it is important to select plants that all thrive in the same general pH
range. Most plants grow better in a solution with a pH between 6 and
7.5. Using the wrong pH for your plants can affect their ability to
absorb essential nutrients, and in some cases can even kill them. pH
levels can fluctuate on their own, so it is important to pH test your
nutrient solution daily.
PPM is the abbreviation for "parts per million"
and it also can be expressed as milligrams per liter (mg/L). This
measurement is the mass of a chemical or contaminate per unit volume of
water. Seeing ppm or mg/L on a lab report means the same thing. You can use a PPM tester to measure it.
The average tap water PPM is between 140 to 400, if yours exceeds 600 use a water filtration device