Yellow leaf tips

Hello, I've got some nice plants but the tip of every leaf is yellow, I suspect this is because I have been overfeeding them by directly spraying the solution onto the leaves as well as putting the solution into the soil. Its fish emulsion in water. We had another plant that did the same thing and in a weeks time it died on us. Any advice will be appreciated.

what kind of fish emulsion, I use the alaskan fish fertilizer and and feed avery other watering. Do you adjust your pH I use pH up because the fish emusion is very acidic.... Also you never foliar feed during flowering, never!!!!!

blanky me thinks uve burnt them or cud b a few other things 2 look at 2.wots ur temp in there coz mine looked like that the first attempt at growin due 2 being 2 hot with 2 higher e.c

I shall not feed directly anymore also ph level was checked and was found out to be way to alkaline have rectified problem.
AM running 400 watter and a 250 watter over hang light at same time at 14 hours as wish for it to grow more before final budding to gain higher yield.
Thank you for your advice guys