Update on my RO + Mega Crop sample. Its been about 24 hours and the PH has gone from 5.3 to 5.6.
BUT - when I took a close look under bright lights, I noticed what looked like some particles suspended in the solution. There was nothing built up on the bottom, and no scum on top, so this stuff is just suspended in the solution.
BUT #2 - there was also one longish hair and what may be a very small bug of some sort also floating in the solution… My grow room must not be very sterile
I dont know if the cloudiness is due to some precipitate or contamination. This is the first time I have seen anything like this with Mega Crop.
So, I just drew some fresh RO and am starting over - keeping the lid on this time. Im going to keep this sample just to see what it does over time.
Edit: Got the new sample mixed up. PH is 5.3 again, and the solution is crystal clear - zero particulates visible.
Edit #2 - the cloudiness I was seeing is nothing like what @Northern_Loki showed above. I had to look closely to see anything.