hello boys and girls =)
this is a little complicated, but im going to merge
*this* thread into my journal and continue it here.
_____________________________________________________________________________________
The matter of algae is a big one for all growers using water methods in their grow.
During this experimentation of hydroganics i have been infected with the stuff, cleaned most of it out and now have a small portion living in my perlite layers.
Under normal circumstances, every instinct screams that unwelcome guests must be expunged, and this is no less for algae.
I propose that in the correct scenario, algae may not only be harmless, but may actually be used to BOOST o2 to your plant.
now by no means am i saying that my way is the right way, im trying to be the guy that hands a doodle to an artist to help describe what they want...im certain that this lovely community could push this to its limits with an open mind, correct some of the fundamental flaws they can see and 'make it work'.
in my current test bucket, only my very first tank went pea green. im now confident that this must have been nutrient debris from my freshly made pots...my transition layer is far from a perfect barrier.
Now i have lodgers in my perlite, but the main water has not populated...there just isnt enough food.
this got me wondering if there really was any harm in the little bit remaining and did some reading up on how to kill it and how it lives.
anyways long story short...UV is a great way to kill it.
so 2 things to consider here
the amount of UV from a CMH bulb sufficient to do the job, but not total annihilation?
A water circulitory system with a uv scrubber in it (and something like fish tank filters to clean up dead algae.)
basically there are two sensible reasons why algae produces a net loss of O2.
not enough hours of light. algae only produce an o2 profit during strong light. so any grow using 12 hours of light or more per day should be ok.
the other consideration is decaying dead algae using up o2 to rot, im sure decent water flow through filters should fix this.
try to imagine a stream with a small amount of nitrates in it in the middle of summer tumbling over rocks with some pockets of algae out of the main flow and UV rays and plants on the banks dipping their roots in the stream to drink.
this does not sound like a o2 deadspot to me.
the other thing is about algae competing for food.
now for me thats not an issue, my plants dont recieve nutrition from the water, and unless algae wants to swim up into the cold dark soil to eat....my plants food belongs to my plant.
as for normal hydro growers that have root rot issues covered. algae wouldnt compete for food if there was enough for everyone...a seasoned grower could learn to alter the dose appropriatly.
long story short, algae may provide o2 for our roots and depending on the efficacy, may even save us from using bubblers?
here is a random article i read on some of it.
Why does alge produce a net loss of oxygen in water? - Straight Dope Message Board
(note to mods, i do not believe this URL to be in any form of conflict or competition to us, it appears on the surface to just be about thinking)