Fertilizer must be in liquid form when it’s poured into the
Add-It® fertilizer dispenser. If using a premixed liquid, you can
pour it in full \strength. If using dry, totally water soluble granular
fertilizer, such as Scott's Miracle Gro®, Peters Professional®,
Bandini Pro Choice®, or Grow More® premix with water at a ratio
of 1 pound of dry formula to 1 gallon of water. Fish emulsion or any
petroleum based additives can only be used in the injector if they have
been premixed with water at a 1 to 1 ratio. Read and follow the directions
printed on the container of fertilizer. Usually, 1 gallon of liquid
fertilizer will cover 1,000 square feet. Apply Teflon tape to the male
pipe threads before inserting them into the dispenser for installation.
Usually 2 to 3 wraps will be sufficient. Hand tighten the fittings when
installing, except for the last full turn, when you may use a wrench
or pliers. Be careful not to over tighten.
To fill the dispenser, remove the top fill cap. Insert a fill funnel
into the opening and pour in liquid solution. Fill the unit completely.
Replace the cap and the dispenser is ready for operation. Turn on the
irrigation system. Consult chart on back to determine how many gallons
of water passing through the irrigation system it will take to empty
the Green Machine Pro® fertilizer dispenser completely. For example,
let’s say that you’ve installed the Model GM 7510 and the
irrigation system is operating at a flow rate of 3 gallons per minute.
Knowing that it takes 200 gallons of water to empty the dispenser, divide
this number by the flow rate of 3 GPM. You now know that it will take
you a little over an hour, or 67 minutes, to not only water your lawn
or trees, but also fertilize.
When time comes to refill the dispenser before you have completed
watering, simply turn off the water by closing the control valve, and
remove both the drain cap on the bottom and the fill cap on the top.
Allow all of the water to drain from the tank, and replace the bottom
drain cap. Place the fill funnel in the top fill opening and refill
the dispenser. Replace cap and turn the irrigation system back on. Once
you have completed watering, there is no need to drain the fertilizer
tank, unless you want to refill it to have it ready for your next irrigation
cycle. It will not harm the unit to have water running through it when
you are not fertilizing. On the contrary, the clear water passing through
the injector will help keep it clean.
Fertilize as recommended during the growing season. During the winter
months, if there is a possibility of freezing in your area, it is highly
recommended that the tank be left drained and vented to atmosphere.
You might also consider covering the tank to further protect it from
the elements. Painting the unit with a water-based acrylic latex paint
will also add to the longevity of the unit, especially if it is exposed
directly to the elements.