if you have the hose too long ,the cone wont sense the moisture very good.i found not letting the hose rest on the medium helps also.most of the time i didnt have to adjust them.there was always one that would act up though!
I thought i was being smart letting the hose go longer, using 1 blumat per 7gal pot. Having thought about it i see your point. Trying to outsmart the maufacturer has screwed me again. Maybe one day i will learn ... maybe
Anyway as long as the pot isnt dry the roots have some water spare that hasnt been used yet, therefore they have all they can use. Maybe instead of aiming for a soaked pot i should aim for a not quite dry pot ?
No, you want that pot saturated for the most explosive growth. When you have the blumats dialed, the pots are heavy, with no runoff in the saucer. If the pot isn't saturated, it's not getting enough water.
7 gal pots are too big for a tropf... You might want to get some maxis if you haven't already... or use a smaller pot.
Kick, push, kick, push, coast... And away we go...
my attempt at a quick summary-
His pulse ppk probably wicks very little now, but the float valve keeps a constant level of water in the bottom bucket if the pump/power fails. His pulsing really maintains the moisture/EC/o2 throughout, and the ´air gap´ created by the tailpeice greatly reduces the amount of medium thats perched with water.
¨In container media, perched water is the water that occupies the lower parts of a medium's mass and will not drain because it is held too tightly for the gravitational flow potential to overcome the capillary attraction of the medium.¨
The blumats seem to keep the moisture levels stable, but co2 and salts could build up. His connections seem to eliminate the chance of a flood and everything thats needed could be repurposed later. Im a big fan of turface (calcined clay) too. theres a good pic of the medium here
so your saying what i was thinking : that the new PPK isnt a wick system but a top feed system with a backup wick res for justin.
and yeah i always wondered about salts removal with a non flooding blumat system, they keep going in and never come out again.
im also interested in turdface, but im sticking with coco/pearlite for now.
¨In container media, perched water is the water that occupies the lower parts of a medium's mass and will not drain because it is held too tightly for the gravitational flow potential to overcome the capillary attraction of the medium.¨
I think you explained it very well Dave. Makes sense to me. Using your example, what if you had a pot that was a mile tall and 1ft wide? In this case would the blumat would turn off long before the bottom media was saturated? Maybe 1 mile tall is a bad example...
Anyway I think you are basically saying that the dimensions are as a large a factor as the volume and I would agree with that.