MAYDAY MAYDAY! We have a problem and it looks really serious from how fast it started. So after I added the H202 and the water my plants straight wilted within an hr. Now I dont know if this is because I poured the unPH'd water straight over the hydroton into the system this time or the h2o2. I PH'd the water to 5.7 after I put it in but it tested at 7 when I dumped it in. I only used 50ml of h2o2 in about 35 gallons of water. They suggest 3ml/gallon so I used half strength, this isn't a ppm problem because they were fine an hr ago before I added the solution, and PPM never raised. This is the plant yesterday nice and healthy. And after I added the water and h2o2 Up close on one of them I'm hoping it is just the water in the rockwool causing this and once it dries up it'll be fine, but with such a drastic change in a short period it's got me worried.
Ok I think i found out the problem. This is the main reason why I didn't want a PH meter, I used the color tester on my "supposedly" 6.0 water and it came out RED. It took me about 200ml of PH up to bring it to a piss yellow around 6.0. I used the calibrating kit on the meter and had it calibrated correctly at first, then it just jumped out of calibration. I think I'm done with meters anyways, after my skepticism was proven, but I did use a cheap Etek city meter. PH is naturally gonna differ a slightly so as long as I know i'm in the ball park I don't need exact PH's because it'll hit it on its own. Plants still look bad but hopefully they recover in a few days, I'm pretty confident the below 4.0 PH was the culprit.