Wow that’s good that you’re patient enough to do that, I usually just rinse it all off then refill hehe.
Check out MegaCrop we have a thread here on OG too:
I’ve used large regiment nutrient programs before like yours and they work great, but are often overpriced and heavily diluted. Half the stuff is unnecessary but they usually formulate it in such a way that you have to use them all in conjunctioknor you’ll be missing something important.
On the subject of your PPM meter, it’s best to look at them as a means to repeat a specific dosage.
So say you find what works best for you and stick your meter in and get a reading. Now you know its, let’s say 1.5EC.
Next feeding you notice that your plant looks hungry and needs more food. So you increase to let’s say 1.7EC
The meter is allowing you to make measured and accurate adjustments to your nutrient strength, and repeat them between watering.
There will be a recommended EC or PPM for your nutrients if you arent already following it. That’s your baseline.
But back on topic, I’d see if the increase in peroxide strength makes a difference before going any further, then go from there.