To say I am impressed with your water clarity is an understatement! When my sips start smelling, I like to shop vac them out (through the fill hole) and my water looks as bad as it smells. The sips hold 8 gallons and I use activated EM-1.
What is your magic sauce? You say you don't have aeration but damn there must be another trick. Compared to my water, I would drink DRINK from your sips! Granted my plants have been vegging for around 6 months and suffered a time or two with out em1 and they look like they need help...
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LOL @ magic sauce, you got me man, I load up the sip with my super soil mix ( varies but usually fox farms ocean forrest with some dry amendments mixed in) dampen the soil as your loading it up, cover with plastic , put the plants in, and fill the res,, and then go to the bathroom sink , fill the watering can with well water , walk back to the grow box and top off the Res when needed, I usually let it get about half or better empty before adding more, lately they drink about half the res per day, and its a 4 gallon res, you can see air stones in my res picture, but i didnt like how the air pump sounded so i didnt run the air stones but they are too big to pull thru the fill port on the SIP, so they are just laying in there for this grow, , i have done this on every grow for several years,, sometimes i have added cal mag to the res, but my soil has enough mixed in that they havent needed any thing but water, the