Nutrient Reservoir top offs

Oops I wasn't done yet

2 1/2 gallon pots in an ebb and flow table. I realize this is not the ideal medium for ebb and flow nevertheless very seldom are there weird Leaf symptoms. 8 week old plants from rooted cuttings under 1000 watt metal halides, temp and Rh are normal, ph is 6.1, ec is 1.6 - 2.0. They have been transplanted and are now in flower. Top drip via home made drip rings and all the new growth is normal like I expected it to be and most of the affected leaves are on their way out and no new ones appear to be forming.
I realize also I am mixing up two different issues here sorry to be confusing.

Paraplant said:

"Clear as mud" you nailed it! Mathmatics, not a place I excel. It's the trade I make to sample my produce.
It is clear to me I need to begin making the switch from ppm thinking to EC. Sorta like standard vs. metric. I should also learn as you said, how much EC each nute component adds to my water in ML/L to have a better overall feel. I can see how this could help me. THANK YOU FOR SHARING! How long do you wait to do a total reset of your rez?

Click to expand...

Here's an old school hydro rule.....I always liked it and it worked when I tried RWDC too.

33% add back.

Mix your 100% solution and add 2x more water and BINGO a 33% solution. pH that and add till full.

When to change? You measure how much you add back. When you get to the point that the total cumulative amount equals the amount you fill the res. with to start. Dump and refill..

Simple, easy and it works.

i tend to go longer between changes. in vegging, i change every month or longer even. in flowering it depends on how good everything is going, i would go as long as 20 days in the first part of flowering and could go for more than a month in my final res when i am lowering the EC preparing them for harvest. However, i also tend to make the res big, 200L for my veg table alone