No I don’t mean being green like saving the planet. I simply mean a pH test being in the green.
Now this is the API freshwater master test kit pH test that measures from 6.0-7.6 where yellow would be dangerously low (not because 6 is too low but because you can’t tell if it might be way lower than that.) And 7.6 is blue. My big Aquaponics system is full of washed shells as media and the pH in that system rarely gets below 7.6 and many plants struggle to get all the nutrients they need at that pH but since the media buffers the pH there is no good way to change the pH without replacing the media.
Well last year I put in a new aquaponic system in the backyard, I call it the 300 gallon system cause that is the size of the fish tank. I was very careful with that system to only use the quartz river rock as media but my well water during the dry season will keep the pH in that system up at 7.6 as well. I have lately installed rain water collection for that system but we haven’t had much rain since then.
This year I set up a tower system and I set up the rain water collection for that as soon as I could and I’m happy to say, that system is in the green and has been for a while now.
I’ve also seen issues of not only Iron lock out in my systems due to my hard well water but also potassium lock out due to the high calcium content. I am hoping that with rain water to top up my systems I’ll be able to get a better balance between potassium and calcium as I’ll be able to alternate between a potassium based buffer and calcium based buffer.
This won’t help the big system much but it is a good sign for both my tower system and the 300 gallon system.