GreenGalaxyFarm
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im just going to have to see which things translate to nft and make adjustments as i go.this is RDWC im talking about.
ok then ill need a 1600l/h = 26.7l/min unit. got this magnetic piston air pump at 40l/min https://futurama.co.za/sunsun-aco-002-magnetic-piston-air-pump-40l-min they are apparently noisy..so add up the actual water volume of the entire system and you need a turnover ideally of 10x per hr. Eg. 50 gal of actual water would be between 200gph min and 500gph. id suggest 500 although in a smaller system you can get away with less.
they round ones are 4'' diameter doesn't say height. then there is a 6'' x 0.9'' bar type? https://www.takealot.com/air-stone-150mm/PLID91220196 which one would you have gone for here.I do suggest the larger 4x2 simply because they are proven and have more surface area (less prone to clogging)
the options at the lab supply store here are 3%, 30%, 35% and 50%. would this be diluted with distilled and normal ro water? does it even matter?id go with the 29% h202 and dilute it. the 3% h202 has a bunch of things added to keep it stabilized in such a low concentration and anything over 30% will likely have severe shipping restrictions
appreciate your input brother