It sounds to me like the color change on the plants is from a transplant shock and pH change, not to worry I believe they will bounce back. In the future Dolomitic Lime will help when added to soil mediums through out the grow. Lime acts as a buffer and prevents any large swings in pH. Lime is not a substitute for due diligence though and all mediums should have run off tested for uniformity (Or soil pH test whatever you prefer). The curling, or eagle clawing of leaf tips is a clear sign of over fertilization cannot say to what degree the severity is only you can at this point. Though without pictures its hard to say what the exact cause is, could be hot spots in your mix (Solution is to mix soil to recipe I MEAN mix, and allow it to sit and "Cook" for 2 weeks before use) also could be "A layer of pure guano at the bottom" as you put. Regardless, truly the fix all is a good flush where 1.5 gallons of out of range pH water (8.5 or above) is run through for every gallon of medium in your container. So for instance if your plants were in a 3 gallon pot you might mix up 6-7 gallons of 8.5 pH water (So you have a bit extra, also could add a bit of dextrose to each gallon for good measure to help bind to accumulated salts) and run it through your containers, after use 1/3 strength feedings till you see noticeable recovery. The reason you want to pH your water to 8.5 is to make the over fertilization in your soil immobile and unavailable for uptake by your already wounded plant, you can reference any one of many pH charts to see at what levels Macro and Micro nutrients become un usable by plant life. I hope this helps your endeavor, but in the future you might get better results if you were to post this firstly in the plant problem forum. Best regards-S0uP