new grower having 1st problem

We need more info and pref pics. It's prob nothing as lower leaves die off as they don't get light. Could be a deficiency.
Ph?
Ec? or feeding programme
Temps and RH?

its a extra small grow 3 plants 6400k lights right now mylar covered walls 18/6 light cycle other than that i water them once a day right before the lights come on and jus let them do their thing

you need to know the pH of the water you are putting on them... and water once a day seems a bit much... if they are drinking it that fast you might be root bound... a pic would be awesome so we can help you out a little more...

could also be over feeding if it's the lower leaf tips.... if you cannot post pics, lay off the fertilizers, and just water a cup or so every other day for a week and see how that goes. if your plants are only a month old that should be all they need, water wise, and in soil you dont need any fertilizers for a couple months, even with super fast growth under direct sunlight

i get my water from the refrigerator its what i used on my outdoor grows in the past this is my first indoor grow though trying to keep as low budget as posible and i dont have a way of taking any pics at the moment finance issues

Cold water causes root shock !!!! We need more info to help you but straight away I can recommend that you take the water out the night before and leave it close to/or in the same room for it to become room temperature. Otherwise 18 - 21 deg C.

what is the pH of your water? It could be as simple as that...

i ve always left my water to gt room temp i have like 6 bottles thtat i fill up at once and just leave them on shelf, i dont use any fertilizers didnt think you had too. how do i find out the ph of my water...i looked at it thisx morning it now has two sets of 3 leaves on top 2 leaves below those and the clover leaves on bottom i noticed th clover leaves are turning yellow i heard it was normal for thse to though...but the two leaves in the middle still have that yellowish tip its still groing each day though how soon can i swith it to flowering cycle im probably going to be moving again within the next 2 1/2 monthes any chance of harvest before then?

How tall is it? 30 cms max for the most use of HPS light. By the end of flower it would be double !! Transplant before 12:12 unless recently done. Keep on veg nutes until flowers start to form.

You really need to go to the beginners room and read some of the past posts. You might be able to pick up some more ideas there that are not too complicated and on the cheap. Happy growing.