please help my babies they mean so much to me

soil from garden in 10 litre but i added 4 inch of coco an pebble at the start of flower
600hps
1 fan over the tops only to cool light
40- 60 rh
ph 6.8 or below never over an runoff 5.9

bio grow for veg
biobloom now for flower
cannazym
an rhiz in veg
temps form 72 to 84 day goes down to 67 by the morn 80rh


my plant is 6 weeks into flower first it showed signs of over fert so i flushed an calmed the feed down but i give it more water now but last two days ive noticed the cause i fimed in an has four colas in the middle the leaves have turned yellowish but not around the out side whast could this be or is it natural but i dont no why the browns there i have the fan blowing ovver top but at night the rh goes up to 80 by the morning other wise when lights on is 40 -60 please help all advice welcome
soil frm garden in 10 litre pot but added a few inch of coco pebble at flowering needed more room for root growth i thought
biobloom 2 ml a litre and i add cannazym 10 ml for 6.5 litres
i first noticed the tips burning so i flushed it a few days ago just used water phed for 2 more feeds then feed it with biobloom abit of pk1314 and thhis is what happened it only at the top though
the next pics are same plant but the buds can you tell me if there doing okay 6 week flowering amnesia
heres a bud at the bootom going along the stem of the main buds shall i take them off to use the energy forthe buds or is it to late


this is the bottom were some of the leaves are going yellow i thought it was expected to do this

I can only see a couple of pics, most didn't upload and the ones that did aren't the best. Also, slow down and take a deep breath.
What follows is only my personal opinion, but I'll take a stab at it.
1) stop flushing, let them dry out a bit.
2) feed normally, you've still got at least a couple of weeks to go.
3) don't trim the popcorn at this point, let the lower buds develop. Next time trim earlier & oftener if you don't want these.

Your temps are ok. RH tends to rise during lights, that's normal. If the 80Rh is sustained, that's too high I think, esp. late into flower.
Keep your fan(s) on at night, at least enough to keep the air moving. Are you getting air exchange 24/7? They need fresh air during darkness too.

The lower leaves do tend to yellow as flowering progresses, although I think it shouldn't if you are 100% dialed in. Most of us are not. Unless you cut a bunch of dead stuff off, yours don't look that bad.

Try to up some better pics if possible. A few close-ups & pics of the whole plant is best.

Welcome to RIU!