Thanks mate
Ill check about the product it will save me much time. I think it was ph issue and since its 25%soil 25% coco 50% perlite medium I am treating it like hydroponic. Ill upload some new pictures to get your opinion.
Cheers
I dont know exactly whats "wrong" with your plants because I dont know exactly whats going on and is hard to say just looking at pictures and the little information we have.
But if you are running coco mix like that you should have your ph around 5.8-6.0
It basically is hydro in a sense its soilless (drain to waste). If you have a mix like that you should really be feeding and watering almost daily or several times per day. Idk exactly how your setup is if your hand watering drain to waste, recirculating it or using flood tables??
Either way a mix made primarily from coco and perlite dries out very quickly. The nice thing about coco is that its a very good medium and has very good drainage and aeration you just need to remember that it absorbs nutrients and binds cal/mag so you need to make sure you are giving it good amounts of calmag if you are not using a coco formula base nutrient. Thats why they have specific coco formulas for running that medium which have the added cal/mag in it. This is especially important if you are using R/O water.
From what you have said thus far I would say it may be a ph issue, but it could also be under/over feeding. May be an issue with salt build up at the roots its hard to say. What base nutrient/additives and ppm have you been running so far and how often?
I dont know how things have been going since you flushed out the containers, but run off ph isnt really that accurate. I would suggest a blue lab ph meter probe you can put into the medium which will tell you exactly where you are at. Coco is bufffered to stay in the 5.5-6.2 ph range typically so as long as you are feeding in that range you should be fine. You never want to feed at the same ph everytime, since different nutrients get absorbed at different ph levels its good to fluctuate the feedings every few waterings. And remember that ph rises after a few hours once you feed. And if you were over feeding the salt accumulation over time will cause the ph too drop. So I would start by focusing on making sure your ph meter are calibrated and on point, and just continue feeding at mild strength nutrients after you flushed and wait to see how they respond. So watering at 5.8-6.0 is the best range to be around. Doesnt have to be exact.
The pistils with burnt tips could be from a few different things: light to close, over feeding, not watering enough, polinated etc.. So whenever you try and "fix" and issue just make sure that you know what is wrong before you make any drastic changes because then you may have new issues to deal with because you misdiagnosed the original problem. It sounds like you know what's wrong so flush them out get the ph back into range, make sure you are giving them enough cal/mag and base nutrients and that they respond well and turn around for the better. Just take it easy on the nutrients after you flush and don't let the containers dry out too much before you resume watering. You never want to feed nutrients on bone dry mediums. If they get very dry just use plain water to moisten the medium and flush out any build up in the containers and then feed them ph balanced water with your nutrients when the medium is moist. Otherwise you can have a high salt concentration and burn the roots and plant feeding that way. In flowering I like to do 50-50 moist-dry and never let them get very dry out completely ever. Most problems in flowering I find happen because people let the containers dry out too much like when they are in veg (which you want them to dry out so the roots can grow and stretch) this isn't the case in flowering. 50/50 is what you want or top 1-2 inches of medium before watering is ideal. Only during the last few weeks is when you want to go back to the 70-30 dry/wet cycle which aids in resin production etc.
Hope this helps good luck my friend!
I had a ph issue when I checked my run off and it was 5.0 my ph meter needed calibration and I was watering with 5.5 instead of 6.5. They did not show any issues in growing phase, it all started with flowering. I flushed and ph is at 6.7. in soil but my girls are messed up. 
What should I do now feed? or just phd water. please anyone any advice 
