a reply to: mOjOm
No problem. I can share some basics.
-Plants roots need at least 50% air to water ratio, this is the number 1 mistake for growing in any substrate.
Soggy roots rot and create fungus and bad nute intake, so substrate needs to be aiy, light and non-organic.
-A Hannah brand or similar tds,ec,ph and temp monitoring device is mandatory for hydro.
-Tap water needs to be filtered via ro before mixing in your nutrients, it has upwards of 3-50O ppm of unwanted junk in it. Plants take only 800 -1100
ppm total, depending on plant, you dont want 500 of that to be junk.
-Your reservoir should be designed or filled to the depth that it is used up in 1 week. Beyond that, it starts getting unstable on the ph, and high on
the ppm and salts from any evaporation reducing water to nutes ratios.
-water temps over 74 degrees grow fungus and algae in the tank, as well as light penetration, so outdoor barrels should be painted black then white
for best results.
-ph is adjusted after nutrients are in the water, they will change water ph give them 20 min to stabalize, then use a couple drops of ph up or ph down
until you get the targeted ph.
-Run a air pump and aquarium stone to keep the nutes mixed and oxygenated in the tank.
-TDS=total dissolved solids. This is expressed in parts per million (ppm). This is measuring the solids(fertilizers) in the water.
-pH-acidity level-around neutral, but dependant on species.
-google your plant and find ideal ppm and ph.
-I would check out that sytem in the link. It is my opinion one of the best setups ever. Runs even at the drippers and its easy to operate. You can
run it outdoors or in, as well as any substrate, even your lawn, when set right.
-Throw tank in garage, basement, or somewhere cool, then run outdoors on a tiny 1/4 distribution tubing. Harbor Freight sells distribution tubing
complete w drippers and stakes, then add pressure reg drippers for consistant flow.
-The pump in setup will do 1-100 plants or more. The "pump on"cycle is adjusted at the timer. If you run pump until soils moist, check your watch,
then set timer to run time, avoiding over-watering. I think it was about 15 plants watered for 1 min in the morning, and again at 1 pm for 1 week,
using 15 gallons, on the setup from link. Extremely efficient.
Check out Advanced Nutrients nutrient calculator. You can input your reservoir size and it will calculate the rest for you. They are rich on their
estimates, so add 10% to your reservoir size on calc.
Added: The plants use just over half their normal ppm when small. If they like 1000ppm as adults, they will generally do good at 600 ppm before major
growth, 300 at seedlings and 50-100 on clones, or tissue prop cloning.
edit on 2 by Mandroid7 because: added to