A few yellow tips, PH drain to waste is low, ec drain to waste is high. Nute burn?

[MercDod]

I have been having problems getting the runoff within range so I have been flushing with nutes ph,ed high and ec low to correct.
How do I fix my ph, ec issue and what is causing the yellow tips. I added the last three feed charts so that you may note the ec, ph in and out in regards to the amount.
I want to get to where I can only have 20% runoff and the ec/ph stays in proper range in waste. This is my first grow. I was up to 1.9 ec but dropped to 1.5 in order to get in range and raised ph for the same reason.

 

[tobh]

they look excellent. I wouldn't be worried about a little tip burn, it's fairly normal when doing what you are. excellent job on nailing the data points on your first grow!

 

[smokedareefer]

^^^

 

[MercDod]

I feed with an EC of 1.4 and a ph of 6.5 to try and get plants in proper output range (EC within .3 of input and PH in a suitable range for plant pickup of 5.5 to 6.5). I will do the same for todays feeding as yesterdays feeding outputs are still off but appears to be getting into range although its taking a little time. EC is now in range, PH in ongoing. Does Mycorrhizae cause ph output to be much lower than input? I only used it to transplant weeks ago.

Target EC	1.4​
Achieved EC	1.4​	Run-off EC Should be within 300 Points of Inflow EC
ph Target	6.5​
ph achieved	6.5​
Final amount of Nutrients (cups)	72​
Target RH	55% RH		Still trying to get runoff correct!
Optional
Pot size (Gallon)	5​	1​	5​	5​	1​	17​
Input Cups	21.17647​	4.235294​	21.17647​	21.1764706​	4.235294​
Plant	1	Small 2	3	4	Small 5
EC out	1.7​	1.7	1.7	1.6	1.6
Ph out range is ( 5.5-6.5, 5.7-6.1 optimal) or (5.8-6.2)
ph out	4.7​	5.9	5	4.6	6
Waste Cups	12.5​	3.75​	6​	8​	3.5​
Percent	59.03%​	88.54%​	28.33%​	37.78%​	82.64%​