Advice for noobs about diagnosing sick plants

Ok so whenever someone has a plant problem here everyone asks the same questions. Included in thoes questions are inquiries abought ph and run off tds. Do not compound your problems with over watering

Plants look awsome at first glance. Praying to the harvest gods. The plant in the back left corner is sad. I watered 2 days ago and it will be probably another 2 before its ready to water again. 90% of the time your problem is ph or tds. After being asked the ph and tds a new grower may run out and test there plants run off. DONT DO IT. Wait untill your pot is dry to water and test run off. Id you dont you risk over watering and the host of problems that can come with it.
As for my plant my guess is slight salt build up in the media causing a loss in turgor pressure and a good flush will fix the droop but i fuess i will know in a couple days after watering next.

Thanks