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They are not just depleted nutes, your forgetting about everything else in the rootzone thats coming back. I guess i should have included a months worth of pissing and crapping in the tote as well as storing a months worth of meals in it ;)

Put a months worth of your meals into a tote and return what you dont eat to the tote, dont wash your plate between meals..thats the equivalent of a recirculated res ;) If plants could pick and choose what they took from a res you wouldnt need to worry about ph, EC or the elemental make up. The...

Run aero drain to waste and you dont have to worry about any of that malarky.

Aye, its head height, 30psi is equal to 810 inches or 20.57m head. The pcds will operate with between 0.7 bar(10.15 psi) and 4 bar (58psi) pressure. Anywhere in that pressure range they will deliver 8LPH because they are pressure compensated drippers ;) You will only need a flowrate of 400LPH...

That pump will do 67ft or about 20m. I used 2lph pcd`s for a precision drip system, I charge an accumulator with a 100psi pump and use the charged tank to run the pcd`s via a pressure reducer, solenoid and cycle timer. The drippers are attached to a modular manifold so they are all in one place...

I`d use something like this, ideal for PCD`s https://www.amazon.co.uk/CARAVAN-MARINE-SHURFLO-WATER-PUMP/dp/B006J7OUEU

It will be alright but from a calculation point of view if its not yara calcinit you wont get the right result.

When dealing with concentrated stock solutions be mindful of compatability and solubility and dont use tapwater to make them ;) Make sure the calcium nitrate you have is Yara liva calcinit not tetrahydrate.

You would enter it into the substance database as a custom item. It can then be used as a selectable component/ingredient (along with others) to acheive a target nutrient formulation. It can also be used on its own via the concentration by weight function which gives the elemental ppm based on...

Ca EDTA (9.5% Ca), 1.05g in 10L will give you 10ppm Ca.

lol, not at all. i`m saying if you adhere to a "set in stone timing" schedule thats based on flowrate, coverage and 5-80 micron mist ,you must have all three or it wont be the right schedule. If AA was the only way to go, i wouldnt have any hpa setups, they`d all be AA ;) Having a throw in the...

The target daily throughputs are based on full coverage of 5-80 mist which hangs for the entire pause duration and then some so the roots are never without mist. If you dont have it, the best approach is to make the pulse as short as practical to maximise the number of mistings and adjust the...

MKP stands for Mono Potassium Phosphate, it has nothing in common with NPK and doesnt contain N ;)

The ice and frozen produce is only stored in the freezer so its already frozen when it goes in. Keeping something frozen takes a lot less energy especially if the container is well insulated ;)

If a freezer full of water took 374 btu to lower the temperature by 1 deg F, the same freezer full of dry air would only take 0.11 btu ;)

The 4.15LPH nozzle flowrate is unique to your system, the same nozzle in a different system would likely result in a different value. The same applies to accumulators, if you have two identical tanks. same brand and capacity they may not be the same. Testing will provide the answers but they...

I suggested using a freezer as a temperature controlled aeroponic root chamber, not a water chiller ;) With a freezer full of water I suspect the compressor`s internal thermal trip would kick in before it got to temperature ;)

The testing gives you a real flowrate of 4-4.3LPH so i would use a 4.15LPH nozzle flowrate for throughput and tank run time.calculations. 1.25 seconds hang isnt bad for hpa. If you make the room pitch black and shine a bright light (10-20w led floodlight) into the chamber it will reveal the...

I use vegas pro but its a much of a muchness as everything depends on the video frame rate (fps).

Flowrate testing is best done using plain water, not nutes cos they weigh more for obvious reasons ;) If the timer has a led indicator you can use that in the vid editting software to figure the timer accuracy. If the vid editting software has an visual audio stream you can use the spikes...