63 days in flower and i think i have nute burn?

i have been flowering for 63 days with tap water that i have not phd, i have been looking for solutions on my own but i decided i need some good advice from the good people on riu, iam thinking its nute burn from salt buildup from my tap water not being phd help please

The thing to remember about nute burn is that it doesn't skip leaves on the way up. The leaves closest to the soil burn first and the problem becomes less pronounced with leaves further away. This is because some of the nutrients are being used as they are transported up the plant, so the concentration isn't as strong towards the top, and also because growing shoots that need more nutrients can handle more.

It looks like Potassium def., and/or possibly Phosphorus. It may even be an all-around deficiency and just needs more fertilizer in general.

id flush the plants with the best water u can find see what happens, they look awfully close to being done tho..just a guess i dont know ur strain er nada. peace

Dicky makes a good point I should've mentioned. Fixing a deficiency by giving it more nutrients so close to harvest could cause new fresh growth that won't have time to mature. Do you know how long they have left?

if u have a microscope with at least 60x mag ck out ur trichromes, i myself shoot for at least 60% amber trichromes, depends on if u like couch lock head rush or a mix. but i would def flush it

the strain is sweet deep grapefruit, i figure they will be done on dec 2nd. they will be in 72 days flower with cfl, but if they still dont look ready i will probably harvest aroun xmas, ive flushed twice so i think i need more nutes besause i havent given them much nutes so far, do you think cal-mag would fix this or should i spend good money on fertz?

Buy the ferts for sure- unless you really plan not to grow again for a long time. This isn't a micronute problem. There aren't many great high-Potassium fertilizers. This stuff is really good, really strong too: http://www.planetnatural.com/site/organic-potash.html You could get something lighter instead like 1-0-4 Maxicrop, since it's the end of flowering. Either one should be mixed with a little N & P.